Dad: Cancer
Stepmom: Pisces
Mom: Sagittarius (divorced my dad when I was two)
Stepdad: Sagittarius (although I think he'd be "on the cusp" of Capricorn since he's Dec. 21st?)
Me: Aries
Sister #1: Capricorn (my mom and stepdad's daughter)
Sister #2: Gemini (my dad and stepmom's daughter)
This is fun, so I'll keep going.
Paternal grandfather: Pisces ("on the cusp" March 20th)
Paternal grandmother: Aries
Dad's brother #1: Taurus
Dad's brother #2: Aries
Dad's brother #1's daughter: Libra
Dad's brother #2's son #1: Scorpio
Dad's brother #2's sons #2&3 (twins): Scorpio
Maternal grandfather: Gemini (deceased)
Maternal "step" grandfather (if this makes any sense...he's been in my life since the day I was born. my original grandfather listed above and my grandmother got divorced long before I was thought of): Pisces
Maternal grandmother: Aquarius
Mom's brother: Cancer
I could probably keep going, but those are all the one's that I'm closest to and I'm most definitely sure about.