Janet Arnold consistently refers to them as breeches in Patterns of Fashion c 1560-1620. If Madame Arnold refers to them as breeches, that’s good enough for me. Some people seem to use hosen and breeches to mean the same thing, though. You should be able to get PoF through interlibrary loan. I highly suggest you do, as it’s a diamond mine of garb information.
There’s a pattern in PoF for Venetian hosen, which is exactly what you’re looking for. The extant ones are made up in horizontally striped fabric, though, which gives a serious girl hips effect. The ones in the link are taken from the Janet Arnold pattern, I’m pretty sure. They’re from the same museum, at least.
For free online patterns, there’s a how-to here for non-paneled, non-cannioned trunkhosen. Vertetsable has a ton of extant pattern manuscripts online, with translations of the pattern captions. The Elizabethan Costuming Page has extensive links to online patterns, both free and not. Unfortunately, it focuses mostly on women’s clothing.
There are no extant patterns or examples of a pantaloon-type garment for women in the SCA period, that I know of. (Unless you want to count the Roman bikini girls.) If I recall correctly, pantaloons really didn’t take hold until the Regency/Empire era in the early 19th century, and not widely until the crinoline came in. I think if women were wearing a biforcated garment on their legs like a man’s, during the Elizabethan period, Philip Stubbes would have ragged on that in his Anatomie of Abuses. (Please someone correct me if I’m wrong.)