Brothers:
0: Orchid
1: Apple
2: Cherry
3: Moon
4: Deer
5: Hare
6: Daisy
7: Stone
8: Storm
9: Leopard
10+: Rain

Sisters:
0: tail
1: spot
2: leap
3: stripe
4: pelt
5: puddle
6: sky
7: gaze
8: pool
9: leg
10+: flight

Oops, accidentally typed 'Your Sinlings' as the title. Though I won't lie, part of me wanted to keep it that way, hah! I got Orchidspot, care to share your name?