What nickname would you use for this name?

[name_u]Mason[/name_u] [name_m]John[/name_m] IV

My husband is [name_u]Mason[/name_u].
His dad is J.
His grandfather is MJ.

My husband prefers MJ, like his granddad. I don’t really like any of my choices, so I’m hoping you guys come up with some unique suggestions!

Mase
[name_m]John[/name_m]
[name_u]Jay[/name_u]
[name_m]Jake[/name_m]
[name_m]Jack[/name_m]
JJ
M(last initial)
[name_m]Jr[/name_m]

You can always give him a nn unrelated to his name like [name_m]Bear[/name_m], [name_u]Sonny[/name_u], etc

[name_m]Jack[/name_m], or could could get away with [name_f]Ivy[/name_f].

Maybe [name_m]Quade[/name_m] or Four since he’s the fourth?

I would [name_m]John[/name_m]

I like the idea of using a nickname inspired by the number four, so how about Tetra?

[name_m]Manny[/name_m] ([name_u]MAsoN[/name_u])
[name_m]Joe[/name_m] ([name_m]JOhn[/name_m])
[name_m]Jon[/name_m] / [name_m]John[/name_m]
[name_m]Mace[/name_m] / Mase
[name_f]Ani[/name_f]
[name_u]Sonny[/name_u]
[name_u]Mo[/name_u]
[name_u]Sam[/name_u] (MAS backwards)
[name_m]Majo[/name_m] / [name_m]Major[/name_m] ([name_u]MAson[/name_u] [name_m]JOhn[/name_m])
[name_f]Midge[/name_f] (MJ)
Jonjo
[name_m]Mack[/name_m]
[name_u]Marron[/name_u]
[name_u]Mars[/name_u]
[name_u]Jojo[/name_u] (too girly?)

I particularly like the idea of [name_m]Manny[/name_m], [name_u]Sonny[/name_u], [name_f]Midge[/name_f], and Jonjo!

Another vote for [name_m]John[/name_m] or [name_u]Jay[/name_u] (J).

[name_u]Mason[/name_u]: [name_u]Sonny[/name_u], Mase, [name_u]Max[/name_u]
[name_m]John[/name_m]: jack, [name_m]Joe[/name_m], [name_m]Jonny[/name_m]
[name_u]Mason[/name_u] [name_m]John[/name_m]: [name_u]Maj[/name_u], [name_m]Major[/name_m],

My favourite for you is [name_u]Sonny[/name_u]