Ooh,
Leo,
Maeve and
Anya would be lovely.
I'm not sure about Beanie but maybe you could use a name that means "blue". I think it would be sweet if he got to play a little part in naming his sisters. I am especially fond of the name
Nila which means "dark blue".
other suggestions:
Leo,
Maeve and
Ada Leo,
Maeve and
AdelaLeo,
Maeve and
Annika Leo,
Maeve and
Clara Leo,
Maeve and
Claire Leo,
Maeve and
Daphne Leo,
Maeve and
Hazel Leo,
Meave and
JemimaLeo,
Maeve and
Nina Leo,
Maeve and
Ruby Leo,
Maeve and
TessaLeo,
Maeve and
Vivienne