Names that rule out other names

[pythianlegume7.livejournal.com]

Kasia is my second favorite girls' name, but it rules out two other names that I absolutely love: Kate and Sasha (for a boy).

I also love both the names Evie and Ivy.

Colin, Callum, Caleb and Calvin (there are some mixes that aren't too close in there...like Colin and Caleb aren't too bad together, but you get the picture)

Eleanor, Elizabeth and Eloise

Laura and Lauren

Margaret nn Meg and May

Leah and Louisa

Got any?