Middle name suggestions for my "short" list?

Middle names are such a challenge for me. Our children are:

[name]Eloise[/name] [name]Julian[/name], [name]Beatrix[/name] [name]London[/name], and [name]Foster[/name] [name]Kingsley[/name].

Here’s our current list for #4:

[name]Ottoline[/name]
[name]Theadora[/name]
[name]Agatha[/name]
[name]Harriet[/name]
[name]Guinevere[/name]
[name]Rosamund[/name]
[name]Ramona[/name]

[name]Atlas[/name]
[name]Squire[/name]
[name]Kasper[/name]
[name]Maxfield[/name]
[name]Hawthorne[/name]
[name]Ignatius[/name]
[name]Thatcher[/name]
Crusoe
[name]Calix[/name]
[name]Harrington[/name]
[name]Rupert[/name]
[name]Evander[/name]
[name]Adler[/name]

I really like word names, place names, surnames. I’m not too into the classics in the mn spot, I like something a bit more off beat and fun.

With a lot of multiple syllable first name options for either sex, why not go with one syllable middle name to balance the flow? Try these:

[name]Bree[/name]
[name]Bryn[/name]
[name]Eve[/name]
liv
[name]Pearl[/name]
[name]Tess[/name]

[name]Clay[/name]
[name]Flynn[/name]
[name]Hayes[/name]
[name]Hugh[/name]
Nasha
[name]Ray[/name]
[name]Rex[/name]
[name]Van[/name]