They are both so wonderful!!
[name_f][/name_f]I think [name_f]Iris[/name_f] wins here for me, with it’s slightly spiky sounds! [name_f]Lucy[/name_f] [name_f]Clementine[/name_f] is lovely though too 
Maybe see if there are any names your mum likes instead of [name_f]Adele[/name_f] for a middle?
[name_f][/name_f][name_f]Iris[/name_f] [name_f]Lucille[/name_f] [name_m]Van[/name_m] [name_m]Cleve[/name_m] would be cute