Stammel is a wooly cloth that is coarse in texture and used for frocks during the Medieval time. The term has been associated with tomboys because like the cloth, They are pretty, but a little rough on the edges.
A young impressionable Jewish boy who is a bit naive and quite shy. (don't forget the gutteral chhhh!) Yeshiva (or Jewish school) boy. Typically, such teen-age boys are very studious, shy, sheltered, somewhat naive, and not at all into the "pop culture" things most typical American boys their age are into.
A young male aristocrat of noble birth. Based on the name Algernon commonly being attached to a man of wealth and inherit nobility. (e.g. Algernon Seymour - the 7th &15th Duke of Somerset and Algernon Moncrieff - The Importance of Being Earnest). "He's an Algie, you better mind your curtsy, dear."