Let's see, my father is an INTJ. His mother was ESFJ and his father was INTJ. His brothers are ENTJ and ENFJ. He has a third brother whose type I do not know.
This is eerily like me!! My father is an INTJ, his mother was ESFJ, his father was INTJ, and his sister is xNTJ. None were tested; and for what it's worth, I don't know how terribly relevant testing is for older generations who have already probably become comfortable in their other non-dominant functions. But I'm absolutely positive about my grandmother and grandfather, and based on a lot of thought and observation INTJ is the best fit for my father; his sister is the only unknown to some degree - I can't tell whether she's naturally E or naturally I - but I lean towards E, as she tends to be much more outspoken than my father.
My mother is ISTJ (she took a short computer test a while back and came out this way - and I have no doubt in my mind that this is what she is), her mother is IxFJ, father is IxTP, and sister is ISxP (her father and sister are very introverted, and the father is a rather cranky old man now who doesn't talk to anyone really, so I don't feel I have any way of pinpointing their exact type - plus I don't know them well. Same goes for her mother. I have no idea whether she's N or S...I think it can be more challenging too with the older generations who had different role/cultural expectations).
I'm INFJ, my brother is INTP. Brother said he took the test back in high school and came out INTP. Based on my observations, I'd have to agree.
Culturally, heavily northern European. My fathers' side of the family were more recent immigrants to the U.S. - late 1800's/early 1900's - and are Norwegian, Swedish, and German. That's it.
My mom's side of the family immigrated much earlier -- from the mid/late 1700's into the early 1800's. Primarily British/Irish/Scottish, with some German.