William is my son's name. When I was mulling over what names I would give his younger sister if he were to ever have one,
Lillian occurred to me. Added to the fact that I thought it a pretty name, was that it was my great-grandmother's name and the name of a great aunt who died young. But it occurred to me, as it did to you, that
William and
Lillian are just too similar to each other when spelled out. So I reluctantly gave up the idea of ever using
Lillian; I do think they're too alike. As it turned out, no younger sister ever came into being (nor, for that matter, did a younger brother.)