One of the things we like at Family History Fanatics is to
be able to have viewer questions and that is because
viewers come up with questions that in a lot of cases we
haven't thought of or scenarios that are probably applicable to
many other people and so today, we're going to be going over
one of those not questions but actually follow-up questions to
one of the past questions we have. This had to do with
multiple relationships. So, let's get into this viewers
question. My maternal paternal great grandfather married my
maternal maternal great aunt and they had a child. This
child is double related to whom? Both my grandparents. How
would this child's children and grandchildren be related to me
and does the DNA percentages work out the same as in the
video. So you can see from this we have actually multiple
questions that we need to answer and to do that we're
going to follow a lot of the same principles we followed in
some of the other videos. First we're going to break down the
question. We're going to draw it out and see if we can't
figure out an answer to this viewer's question. So let's
begin with this first sentence. We have my so this person will
just call V for the viewer. My maternal paternal great
grandfather. So that's going to be G. So let's draw this out
and we end up with something that looks like this. Now we
don't necessarily know who all these other people are but we
know who V is and we know who G is. And those are the important
ones here. So next this maternal paternal great
grandfather G married my maternal maternal great aunt
and they had a Childs. We have two more people into this. We
have A, the maternal maternal great aunt and the child of the
maternal maternal great aunt and the maternal maternal great
grandfather. I hope you're not getting too confused here but
we can again draw this out and we come up with a chart that
looks something like this. So, the question we want to ask
ourselves is who do we really care about and we can block out
anybody whose DNA we don't need. Usually, this is going to
be spouses who are then unrelated through the different
chains. So, in this case, you can see I've blacked out these
spouses whose DNA is not going to be contributing to any of
the matches that we're concerned with. This child C is
double related to whom. So the viewer recognizes that this
child has a double relationship but she wants to know how is
this child double related. And she makes a suggestion of both
my grandparents. Let's draw out the different relationships.
First off with this blue line we see that C is related to B
by going through G down to V's mother. We can also see that C
is related through A going around and down to V's mother.
So the first double relationship actually is with
V's mother and then naturally any of her descendants are also
going to be double related to C so since the viewer is the
child of her mother she is going to be double related now
what relationships are these well we can again look at the
map and we can see that this first relationship is a half
niece and this second Is a first cousin once removed.
Okay. So we know what those two relationships with the mother
is which means we can figure out the relationships with any
of the mother's descendants. Now going back to this question
I did notice something. The suggestion that the viewer made
was is this person related to both of my grandparents. And we
found out this person's actually related just to the
mother of the viewer not to the grandparents which made me
think hm could I have possibly drawn this wrong in other words
I saw maternal paternal and I assume that this is through the
mom's dad that great grandfather and this one is
through the mom's mom's great aunt which would be on the same
line since they're both starting with the mom but if
what she really meant was my dad's mom's great grandfather
and my mom's mom's great aunt then what I've drawn is
actually going to be different and so there might be some
confusion there but I'm not going to redraw this I actually
don't know which one it is so I'm going to continue on with
what I have drawn already and you as the viewer can go and
actually redraw this in the other way to see how those
relationships would change but let's go on to the second part
of her Question. How would this child's children and
grandchildren be related to me? So we've introduced 2 more
relationships. The children of this child C will label that D
and the grandchildren. We'll label this B because we've
already used G for this great grandfather. We have these two
relationships initially to the mother. So what we need to do
first is we need to figure out the relationships to V and by
doing that we're actually just going to go down one
generation. So you can see here this becomes a half grand niece
and this becomes a first cousin twice removed instead of a
first cousin once removed. Now, we have those relationships
which are going to help us determine the other
relationships but we're going to have to redraw our
chart here and put in the children and the grandchildren
of C. Once again, blue line is one relationship, purple line
is another relationship. As we follow the from D we see that
this is a half first cousin once removed and as we follow
the other relationship around we find that this is a second
cousin once removed so now we're going to look at the
relationships with B. Again we have lines drawn so you can see
how that's flowing and this first one we see is actually a
half second cousin and this other relationship is a third
cousin. So, that would be how the children and the
grandchildren of C are related to V and yes, this does get a
little bit complicated which is why I like to draw things out
to be able to trace how these relationships are going. So,
that answers the first two of this viewers question. So,
then, we come to their last question. Does the DNA
percentages work the same way as in the video and that simple
answer there is yes, it does. Anytime you have multiple
relationships in order to figure out how much DNA you
should be expecting. Remember, each relationship's going to
have a range. You need to take whatever that range is for the
one relationship and add it to the range for another
relationship. Now, in this case, both of these ranges, a
half second cousin and a third cousin start at zero. So, you
might not actually share any DNA with the grandchildren of C
but a half-second cousin is going to share somewhere up to
around maybe 200 centimorgans. I don't have the chart in front
of me and a third cousin is going to share somewhere around
125 centimorgans. So you could actually share maybe as much as
300 or a little bit more centimorgans with this person.
Now if you didn't know that you had a double relationship then
having those two added together might make it look like it's a
much closer relationship like it's a second cousin. But
you're not finding the many on your tree in that case. That's
why we need to always think of multiple relationships when
people aren't showing up where they are based on the amount of
DNA that we share with them. Now, I like to do these
questions about multiple relationships because almost
all of them are pretty unique and it usually challenges me to
go out and draw what is happening. In fact, I'm
going to show you what I had to do to get to this point.
Initially, I was drawing this right here and I realized,
nope, that's not working right and so, I went to this right
over here but I realized, no, that's also not working right
and then, I drew another little thing here but no, the
relationships didn't match up the way I wanted and finally, I
went and started drawing this here and you can see, they're
starting to get a little bit more complex as I'm drawing
them and and in this case, yeah, it was but this was just
the initial sketch that I didn't really like and so I had
to rearrange that sketch to create this sketch here and
from there, it was a lot easier to try to figure out what these
relationships were. So, in the video here, it looks like, hey,
I throw up this pretty picture but there was actually a pretty
involved process of trying out different ways of what I think
was happening here in order to get the right picture to be
able to explain it and that's why I recommend whenever you
come across something that is difficult as far as
relationships, start by drawing out a tree of how those people
are connected. Make sure all of the known relationships that
you have match up with that tree than before going forward.
Now, if you like this video and you want to watch something
else about Multiple Relationships, then, check out
this video up above. Be sure to click a like and subscribe to
our channel so that we can give you more videos each week. One
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