His mother is also the founder of a Super PAC: https://www.influencewatch.org/person/barbara-fried/
This is a good article about Mind the Gap, the Super PAC she leads: https://www.vox.com/recode/2020/1/6/21046631/mind-the-gap-si...
His brother also used to work on Capitol Hill, then "worked for Democratic Party-aligned consulting firm Civis Analytics" before founding a lobbying group whose principal funder was SBF.
https://www.counterpunch.org/author/gbbnknfrd2211/ https://www.influencewatch.org/non-profit/guarding-against-p...