A surname of Ross, and you want G-G / B-B / G-B sets...
Trying to write a novel myself, and I can always find some really interesting names...
From Girls names, you could try pairing any one of these names:
- Georgina Drewe Ross
- Maria Samantha Ross
- Davina Lacey Ross
- Kacey Elina Ross
- Annabella Devon Ross
- Tori Dakota Ross
- Hannah Freya Ross
And The same with these boys' names:
- Leo Michael Ross
- Jordan Tyler Ross
- Hayden Caleb Ross
- Gareth Damien Ross
- Kyle Ellis Ross
- Harrison Felix Ross
- Adam Danté Ross
Personally, the three I would probably go for are:
G-G = Annabella Devon & Davina Lacey
B-B = Jordan Tyler & Kyle Ellis
G-B/B-G = Adam Danté & Kacey Elina
Hopefully this helps you in some way...