First initial + last name. Pronounced as one drawn out syllable, sorta like the campfire desert rather than two distinct ESS Morris sounds. I've been signing drawings (mechanical, I'm a draftsman/designer) like that since about 1969. First used the user name "digitally" on Cleveland Freenet in the early '80s, and on AOL way back when there were less than 25k members. It's my handle on every forum I'm on except one Subaru board, where it was already taken.