I recently purchased an oil Painting dated 1979 of the Fountain in Lake Eola Park in Orlando Florida with surrounding buildings of Orlando with the initials of the artist M.E.M. any information on this
Emma S. Bellows is a person whose initials are ESB. Her husband, George Wesley Bellows was an artist. When he died, many of his lithographs and drawings were unsigned. Emma signed them with his name, then added her initials.
The only artist that seems relevant to this is Kib Bramhall. "http://www.cravengallery.com/bramhall.html" as far as anchient painters and such I don't believe there is one. (your question wasn't very specific sorry D: )
The place to find a truly unique pendant with initials on it is Etsy. The artist-based retailer offers knick-knacks from all over the world. Etsy prides itself on supporting handmade and unique items sure to suit any interest.