I usually don't got for 4 syllable names as I find them a bit too frilly/OTT but I've had this name on my mind lately because I love most all of the possible nns (Billie, Minka, Willa and Minnie, in particular). I like Willa (nn Billie) on it own but I'm not sure which is better - which do you prefer and do you think Wilhelmina is too long?
My VERY first thought for combos was Wilhelmina Pearl and Willa Frances but I could use some other suggestions.