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General => The Common Room => Topic started by: chanel on Wednesday 07 August 19 02:44 BST (UK)
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Hi all,
If two people have a common grandfather but different mothers (not grandmothers), are they still first cousins?
Chanel
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I don't understand the question. Don't all first cousins have different mothers (and fathers) from each other? If they shared a parent then they would be half-brothers or sisters.
Can you give a little more details so that we can understand the situation ?
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Oops, sorry. My question should have said "......same grandfather, different grandmothers…….". The grandfather sired an illegitimate girl (my mother), then married a lady totally unrelated, had a son who married and then sired a girl. What is this girl's relationship to me?
Hope this clarifies things.
Chanel
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Hi all,
If two people have a common grandfather but different mothers (not grandmothers), are they still first cousins?
Chanel
Yes. First cousins can share just one grandparent, and that grandparent can be male.
JM.
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Oops, sorry. My question should have said "......same grandfather, different grandmothers…….". The grandfather sired an illegitimate girl (my mother), then married a lady totally unrelated, had a son who married and then sired a girl. What is this girl's relationship to me?
Hope this clarifies things.
Chanel
Your grandparent is simply one of the parents of one of your parents. You don't need to be married to be a parent or a grandparent.
JM
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Thanks JM.
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A stricter definition would be half first cousin.
First cousin would be good enough for me though.
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They would normally just be referred to as first cousins, but if you are working on DNA analysis then it is important to specify the relationship as half first cousins. This enables an understanding that they will share less DNA than full cousins.
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Thank you for your contributions. It seems they're essentially first cousins. I'll settle for that.
Chanel.