Thank you for this piece of information! In fact I have Bahlow on my shelf, but I didn't look closely enough, as SCHWEHM is listed with SCHWEIM. Somebody told me, the name SCHWEHM had something to do with the name SCHWEMM. This is supposed to be the name of a rafter (from schwemmen, to flood), he said. However I can't find this name, all I find is SCHWEMMER.