Letters as nicknames

So me and my boyfriend occasionally call each other just the first letter of our names. It’s really cute, and something I may consider for future children, as a rare nickname that only the immediate family calls them. What letters sound like they could be a nickname to you, and what gender would you associate it with? For example, L would be weird on a boy, since it sounds like [name_f]Elle[/name_f]. Also, what are some two letter initial combinations which make a nickname, such as L.E ([name_f]Ellie[/name_f]), C.C (Cici) and E.V. ([name_f]Evie[/name_f])?

I think C (for a girl, but works on a boy), B (for a girl - like [name_f]Bea[/name_f]), A (more on a boy, but works on either), G (girl), Z (boy) and M (girl).work

Two letter combos:
[name_f]FE[/name_f] ([name_f]Effie[/name_f])
AJ (Ajay)
ME ([name_f]Emmy[/name_f])
KC ([name_u]Casey[/name_u])
SE ([name_f]Essie[/name_f])

I love the idea of letters/initials as nicknames. Some real life examples: my sister is named [name_f]Gabrielle[/name_f] and goes by G about half of the time while at home, and I went to school with a [name_u]Jacey[/name_u] (short for [name_f]Jessica[/name_f]-[name_f]Claire[/name_f]) and a JD/JayDee (short for [name_m]John[/name_m]-[name_m]David[/name_m]). (Also our dog’s birth name was Cookies-and-Cream so we’ve given her the middle name CC ([name_f]Cece[/name_f]) ).

PJ - Pjay (uni)
LC - [name_f]Elsie[/name_f] (fem)
VO - Veo (masc)
TO - [name_m]Teo[/name_m] (masc)
RE - [name_u]Ari[/name_u] (uni)
MC - Emsie (fem)

My initials in English are BZ, which could get me the nickname [name_f]Busy[/name_f] (like [name_f]Busy[/name_f] [name_m]Philips[/name_m])
KT like [name_f]Katie[/name_f] for a girl
And I like a lot of _J nicknames. PJ, DJ, AJ, CJ, MJ, JJ etc.
If your initials are JM you could go by [name_u]Jaime[/name_u]