WDYT of these Emma/Serena name combos?
Emma-Claire
Emma-Serena
Emma-Kate
Emma-Katherine
Serena-Claire
Serena-Katherine
Serena-Lily
Emma-Lily
Lily-Serena
Lily -Katherine
Lily-Lauren
Lauren-Lily
Note: I prefer hyphens in double names, and to eliminiate the middle name.
Emma-Kate is my favourite. The ones over 3 syllables feel a bit too long, and I feel like Lily-Lauren is kind of hard to pronounce (too many Ls).
I think Emma-Claire and Emma-Kate are nice. I like Lily-Katherine too
Emma-Claire and Emma-Kate are also my favourites. Lily-Katherine is also very pretty.
[name_f]Lily[/name_f]-[name_f]Katherine[/name_f] is lovely! 
I think I like Emma-Claire and Lily-Katherine best
Emma-Kate, Serena-Claire, and Lily-Katherine (or Lily-Kate) feel the easiest to get to stick as a double barrel, but I like Lily-Serena and Serena-Katherine/Serena-Lily a lot. [name_f][/name_f] There was a berry on here years ago who had a daughter named [name_f]Serena[/name_f] [name_f]Isabel[/name_f] [name_f]Joy[/name_f], I think Serena-Joy would be a great double barrel too.
[name_f][/name_f]Good luck!