I'm eldest (by 18 months and 7 years respectively) of three.
I was INTJ before they knew what to do with me. Mother (I think ISFJ) claims my character was evident even before I learned to walk.
Dunno my father's type. Really can't tell.
Younger bro, dunno, he's not with us any more.
Much younger sis, also don't quite know, but she might well be ESFJ.