A middle name for Eric

[name_m]Hi[/name_m], I’m writing a short story where I have a baby being born in a sort of hostage situation. His name is [name_m]Eric[/name_m], and in “eternal king”, which sounds like a great adult name for me. But I was wondering if there was a middle name that could be more cutesy and child-like, and would compliment the meaning of [name_m]Eric[/name_m].
Nicknames for [name_m]Eric[/name_m] would also be welcomed.

[name_u]Charlie[/name_u]
[name_m]Felix[/name_m]
[name_m]Johnny[/name_m]
[name_u]Arlo[/name_u]
[name_m]Henry[/name_m]
[name_u]Sam[/name_u]

[name_m]Eric[/name_m] [name_m]Milo[/name_m] (merciful; soldier)
[name_m]Eric[/name_m] [name_u]Willie[/name_u] (resolute protecter)
[name_m]Eric[/name_m] [name_m]Liam[/name_m] (resolute protecter)
[name_m]Eric[/name_m] [name_u]Theo[/name_u] (divine gift)
[name_m]Eric[/name_m] [name_u]Finn[/name_u] (fair)
[name_m]Eric[/name_m] [name_u]Noah[/name_u] (rest; wandering)