Hi, yes we have ambi people in our family, going back at least to one great grandfather. He was very athletic, used his lefty abilities to advantage in sports, also pretty smart but not sure about log.
I am ambi, HG, lefty for writing and righty for sports (large motor stuff, I guess).
Ds9 seems to be somewhat ambi, righty for writing but he is faster with his left hand on coordination tests. (MG)

I have found this a disadvantage when trying to learn left from right; he was slow with this as well, but no big deal.
Dd4 seems hardcore righty already; she is probably EG.

My PG brother wanted to write left handed and did so without difficulty but he was really a righty, not sure if that 'qualifies', he was/is just odd. laugh

My EG husband is lefty-lefty-lefty! His PG sister is righty all the way, from what I know.