I think Summer Leslie Jayde rolls off the tongue easier than Summer Jayde Leslie.
Thats what i think as well!

And it must be a Jacinta thing because i want to call my first girl Summer. I was thinking Summer Faith as Faith was my nans middle name. But then my DP said it sounds like a "Buffy" Character but then again how is that bad i love that show!! Then i was thinking Summer Naomi because Naomi is my mums middle name. I want middle names that mean something... and i also have the last name "Babb" to work with so no matter what names i come up with nothing goes with that!