monogram

tanda atau lambang identitas seseorang (organisasi, lembaga, perusahaan, dsb), biasanya dibentuk dr huruf-huruf awal namanya

a graphic symbol consisting of 2 or more letters combined (usually your initials); printed on stationery or embroidered on clothing

A character or cipher composed of two or more letters interwoven or combined so as to represent a name, or a part of it (usually the initials). Monograms are often used on seals, ornamental pins, rings, buttons, and by painters, engravers, etc., to distinguish their works.