I had a friend named Emmett and I called him Mem lol not sure how I got that but just stuck
I could only think of M&M, like the Candy. 😅 Emmett is fairly short and tough to find a nickname.
Mett Mettie
Em
I had a friend called Emíle and he went by Ems, it would work for emmett too
Eme/Emi
aw, little E is so cute! 💙 Mett. Emsy/Emsy. Emmy/Emie/Emi. Metty/Mettie. Metzy/Metz. Mitty/Mitt. Mittens. Minty. Emety. Memo. Meme. Emoji. Metz. Emu. Etty. ET. the name Emmett means "truth", so maybe True/Tru, Truth, Trust, Truly, Trudy.... 💙
Emi, Eminem(like the candy)
Emi