He's an Azande musketeer. I think I got mine as a bonus figure for buying the Zande army deal (there was a time when they did that: buy the entire army and get three or so extra character figures - when they stopped doing it the characters vanished from the site, though they occasionally turn up in packs and as freebies). Foundry also used to do a pack of Zande musketeers in those funny little hats, but they currently don't show up on the website.
The other ones in the pic are actually from Copplestone castings. He did one more pack of Zande to "finish off" the range after he left Foundry and sold them himself.