Figure out my last name.

Flare Understream.

BRUH

bruh lol

*MC gently opens the door*

BRUHMAO

Thank you.

*Bruh!* :D

Flare Embros

Bruhoice

Thanks Bruh

*says np in bruh*

Flame

Reminds me of nintendo calling Luigi Luigi mario.

Flame Flame Flare

Flare the flame

Flare Ignition (idk why i love using those kinds of words bruh)

Flare Pyro

Flare Ace

"Ace" *One piece marineford arc flashback*

Your last name is cool since your full name is memez_cool

but he's FLARE

Oh then his last name is flare

flare blaze

flare flambé

by any chance does he have the culinary skills as well?

most likely

excellent

_The_Fire

Heats Flamesman, so your name should be Flare Heatsman /j
I like PF's suggestion of Flare Embros

flare bean

flare, azen

Heatsman

Flare Fire

Embero