B/B: Matthias Luke and Martin Isaiah
B/G: Matthias Luke and Mariel Alice Elaina
G/G: Mariel Alice Elaina and...
Options would be:
Eleanor Rosalie Delilah - "Ellie" or "Nora"
Anwen Bryony Delilah - "Annie"
Elspeth Jane Mathilde - "Ellie"
Annabelle Catherine Violet - maybe "Anna," maybe no nn.
And maybe a few others, but that's good enough. The first girl name is definite, but the second would definitly give me a bit of trouble.