I'll just list those that have been had the most influence in my life growing up.
Dad: INTJ (my dad is a tricky case since he was very much ADHD, all over the place, felt anxiety from sitting still too long, even appeared extroverted, but he told me a few times over the years he's naturally more kept to himself and that his job and position brought out his "extroversion".)
Brother: INTJ (I've been flip flopping on my brother's type since he's still very much growing into his skin, but he's NTJ for sure since he takes on very many of the same character traits of my dad)
Mom: ISFJ (100% certain of this)
Close female cousin, same age, basically grew up together: ENFP
Slew of male cousins I also saw often and grew up with, two INFPs, Se galore with the other cousins.
Mom's sisters: ESFP and ISTJ
The general feeling my brother and I felt growing up around our cousins is that we didn't fit in with them much at all. They were faster-paced, into extreme sports, preferred slapstick, crude humor, (they loved the Jackass series) and while we all got along and they were cool and all, there was not much we could ever connect on . My brother basically stuck to my side while I played along in the chit chat.
With my ENFP cousin, we've always felt like two peas in a pod and often had many of the same concerns and experiences growing up. I always imagined our relationship being the sort of brother/sister relationship I'd idealize (I only have my younger brother) We saw situations from essentially the same perspective often times.
With my male INFP cousins, they tended to keep to themselves and had their creative outlets, but we're also obvious in their attempts at trying to "fit in". Being a male Feeler or female Thinker isn't the easiest.
All in all, I'd say my childhood was one of me constantly seeking out an acceptance from others since I was always made clearly aware of how much I didn't fit in with most others, particularly among other males I grew up around. As a young child, I felt an emotional area of comfort with my mom since my dad seemed devoid of it. But maturing and growing up, my relationships shifted and I grew a fondness with my dad as he was much more readily accessible in discussing big picture life views with me and talking about ideas I'd formed on my own of people through my interactions. He was also very astute in reading people, so we shared that fascination for psychology.
Ultimately, is there a connection between my childhood and my typing? Certainly, I can't imagine anyone growing up and being surrounded by so many personalities and not being molded by them growing up. But has my experiences potentially defined my typing? I can see the influence in my enneagram typing, but MBTI, no.