Teddy Roosevelt & FDR were even more distant than that:
https://criticsrant.com/franklin-roosevelt-biography/
Marriage to cousins of degree > 1 used to be very common.
(My mom has a Brady Bunch family that combined two large Irish Catholic households; I count 13 on my dad's (Slovak) side).
It’s wild to me. I try to be thoughtful in building deep family-like connections outside of actual families to hopefully help compensate. My grandpa was an huge formative influence on me and that’s the part that saddens me the most (he doesn’t even know what having a grandpa is like).
Also our holiday gatherings aren’t huge, usually 10-20, but the family that comes is pretty far removed from nuclear just because there’s not a lot of us.