And teamster and gangster. It's possible that teamster is a slurred together version of team-master - just my thought, I haven't researched that.

It'd be funny if these tough gangsters who wouldn't want to be seen dead with a feminine sounding name, have been known as "gang-sisters" all this time. (Poetic justice, in the humour department, in my opinion, especially relating to the woman-denigrating gangsta-rappers. Just pause here a moment while I ROTFLMAO!)

There are other names ending with "ster" but they don't necessarily come from the word "sister", e.g. Worcester, McAllister. So "cester" is an anglicised version of the Latin for "castle" (I think, from memory), and I don't know the etymology of McAllister.

Helen