I think that is perfectly acceptable. They are different enough it won't feel the same unless they share a nn.
My sister's name is
Nicole and one of our younger male cousins got named
Nicolas. Only minor confusion has ever resulted from this mostly since they both share the nn's
Nick and
Nicky spelled the same way. I usually call my cousin
Nick and my sister
Nicole or
Nicky.
-------------
Favorite Names:
Dorothea,
Marguerite,
Aurora,
Fiona,
Artemis,
Vivian,
Hazel,
Clara,
Leona,
Luna,
Maeve,
Iris,
Frida,
Matilda,
April,
Flora, Cascadia,
Serafina
Kieran,
Rowan,
Brendan,
Tristan,
Cedric,
Cedar,
Arthur,
Magnus,
Malcolm,
Adrian,
Julian,
Robin,
Connor,
Xavier, Gryphon,
Gavin,
Teagan