Monogram or Motif or Grapheme
A monogram is a motif made by overlapping or combining two or more letters or other graphemes to form one symbol. Monograms are often made by combining the initials of an individual or a company, used as recognizable symbols or logos. A series of uncombined initials is properly referred to as a cypher and is not a monogram, although ciphers are frequently referred to as monograms. A monogram may be a craftsman’s signature on pieces of art such as sculptures and pieces of furniture, especially when the guilds enforced measures against unauthorized participation in the trade. An individual’s monogram is often a very fancy piece of art for adorning luggage, clothing, and so forth.