Which name goes best with sibling's names? Please read description.

We have a 6 year old daughter named Lola, a 4 year old son named Anthony (mostly called Tony though) and a 2 year old son named Luke. We're pregnant with baby number 4 (our last baby), a second girl and we're not sure which, if any, of these names sound good with our other kids names.

Also, for any Dianas out there or moms with Dianas, is it inevitable that they'll end up being called Di? Cause we aren't a fan of the nickname.

Follow up question, should we use an A name instead cause we have two L name and one A name already? Does that matter?