Why do we refer to our parents Aunts & Uncles as “Great”, yet we refer to our parents parents as “Grand”. True, our parents grandparents are “Great Grandparents” but Uncles and Aunts get to be “Great” without the extra generation. Why don’t we refer to our parents Aunts & Uncles as “Grand Aunts” or “Grand Uncles”?
Mainly because we think Grand Uncle sounds funny. However, if you are checking consanguinity tables, you will see the term “Grand Uncle”.
In the US, “Great Uncle” seems to be preferred, but in the rest of the English speaking world “Grand Uncle” is used.
My family tree program makes charts showing relationships and the software uses “Grand Uncle/Aunt”.
If you say “Grand Uncle/Aunt” you can keep your generations in order better. (Your Grand Uncle/Aunt should be a brother or sister of one of your grandparents.)
Now, let’s move on to second cousins, twice removed.
My mother’s cousin: what is she in relation to me?
She would be your cousin (of the same degree) once removed. For instance, if she were your mother’s second cousin, she would be your second cousin once removed.
My cousin’s daughter: what is she in relation to me?
She would be your cousin (of the same degree) once removed as well.
My cousin’s cousin: what is she in relation to me?
It depends. If you all have an ancestor in common, you’d be cousins (to the greater degree of the relationship). For instance your first cousin’s second cousin (assuming you are all related by the same ancestor) would be your second cousin. If you don’t have an ancestor in common, you’re unrelated. For instance if you have a first cousin where you are both related on the maternal side (i.e. you both share the same maternal grandparents), and that cousin has a first cousin related on the paternal side (i.e. they share paternal grandparents), you are unrelated to your cousin’s cousin.
So is grandnephew more proper than great-nephew? I always get a funny look when I talk about my grandnephews and grandniece. And I wish it was because I am way too young to be a great-aunt (I am, BTW), but no it’s because I use the term “grand-”.