I have to say I wouldnt use it either.
My mum had my sister Samantha and then about 9months later, my aunt had he son Sam....It never did sit right with Mum and I can see why. But then again we saw them often
I was supposed to be a Louise but as my father had a cousin (a long distant never see sought of cousin) he wouldnt let mum use it lol And I am glad...there is a lot to be said for being uniquley named in a family. Then you arent just "Jane's Ellie" or "John's Ellie" you are just Ellie. iykwim.