Similar names - same family

Okay.. Need some advice here.  My aunt is pregnant and expecting a month after me. She has already announced she is naming her baby Bella.  My husband and I have had our baby girls name picked out for quite a while - Ella.  We aren't telling anyone the name until she's born. I know they aren't the same name but they're very very close.  Is it wrong/strange to name our babies such similar names?