[name_f]Arabella[/name_f] [name_f]Margaret[/name_f] is just perfect. It’s truly a beautiful name and matches her elder sister the best. I know you have previously mentioned a bad association to the full initials but I think realistically the full initials will rarely if ever be used. In my experience if initials are used, it’s only first and last name. I’ve personally never used my full initials. When choosing a name we tend to analyse and pick everything apart because we’re making a big decision. But once the name is chosen, we often don’t worry or even think about some of those things we were analysing before.