QUOTE
I agree with PP. I think the names you have chosen are far too close to your children's names.
Kayden - Kayne - I also think Kenan is too close to Kayne too
Koen - Corbyn
Jonah - Noah
Ditto. Sorry

Brayden - Is the only one that would sound ok with your other kids names, but Im really not a fan of it!
Other suggestions:
Joshua, Kayne, Corbyn, Noah and Josiah
Joshua, Kayne, Corbyn, Noah and Nathan
Joshua, Kayne, Corbyn, Noah and Logan
Joshua, Kayne, Corbyn, Noah and Jackson
Joshua, Kayne, Corbyn, Noah and Kieran
Joshua, Kayne, Corbyn, Noah and Jordan
Joshua, Kayne, Corbyn, Noah and Bryce
Joshua, Kayne, Corbyn, Noah and Ryan
Joshua, Kayne, Corbyn, Noah and Tobin
Joshua, Kayne, Corbyn, Noah and Weston
Joshua, Kayne, Corbyn, Noah and Ethan
Joshua, Kayne, Corbyn, Noah and Oliver
Joshua, Kayne, Corbyn, Noah and Jacob
Joshua, Kayne, Corbyn, Noah and Liam
Joshua, Kayne, Corbyn, Noah and Thomas
Joshua, Kayne, Corbyn, Noah and Tyler
Joshua, Kayne, Corbyn, Noah and Owen
Joshua, Kayne, Corbyn, Noah and Dylan
Joshua, Kayne, Corbyn, Noah and Evan
Joshua, Kayne, Corbyn, Noah and Elias
Joshua, Kayne, Corbyn, Noah and Riley
Joshua, Kayne, Corbyn, Noah and Lucas/Luke/Luca
Joshua, Kayne, Corbyn, Noah and Jack
Joshua, Kayne, Corbyn, Noah and Avery
Joshua, Kayne, Corbyn, Noah and Davan
Joshua, Kayne, Corbyn, Noah and Gavin
Joshua, Kayne, Corbyn, Noah and Edmund
Joshua, Kayne, Corbyn, Noah and Ian
Joshua, Kayne, Corbyn, Noah and Angus
Joshua, Kayne, Corbyn, Noah and Levi
Joshua, Kayne, Corbyn, Noah and Samuel
Joshua, Kayne, Corbyn, Noah and Lincoln
Joshua, Kayne, Corbyn, Noah and Ezra
Joshua, Kayne, Corbyn, Noah and Miles
Joshua, Kayne, Corbyn, Noah and Cail
Joshua, Kayne, Corbyn, Noah and Zachary
Joshua, Kayne, Corbyn, Noah and Rupert
Joshua, Kayne, Corbyn, Noah and Hugh
HTH