These are all lovely, so you can’t go wrong with any of them, but since it’s a middle name, if I were you, I’d probably choose [name_f]Merryn[/name_f] since it looks the closest to [name_f]Meryl[/name_f] and won’t be seen spelled out by very many people in her life, so not many people will even have the opportunity to judge the spelling as trendy. [name_f]Hope[/name_f] that helps!