Husband is a left handed engineer. One brother in law is a left handed architect. The other brother in law is licensed contractor. All are really good with numbers.
Interesting because my husband, I and my kids are all great with math, and yet my husband is the most seriously right handed individual I have ever met.
My one daughter seemed to lean that way as a baby to the point where I was starting to be concerned because her left hand would just sit at her side while she exclusively used her right hand. She’s the most math inclined of them all, it turns out.
The other two, no slouches in math by any means are almost ambidextrous.
I’m somewhere in the middle and not as math savvy as the rest but can hold my own mathematically. Once I got a teacher who actually taught me math the right way.