Mine is simply a derivation my name, Joseph Anthony Trelli.
A company where I used to work would just concatenate the first 4 letters of one's last name, initial of first name, and middle initial(if any) together. TRELli, Joseph Anthony -> TRELJA
A company where I used to work would just concatenate the first 4 letters of one's last name, initial of first name, and middle initial(if any) together. TRELli, Joseph Anthony -> TRELJA