Kaballah is in Realms of Power The Divine (Revised for corrections to the Judaism section) as it is a Jewish element.
Numerology and Geometry and Alchemy are in The Mysteries Revised edition. There's an entire cult dedicated to using the first two, who also refuse to eat beans.
Alternate dead languages can be found in The Sundered Eagle: The Theban tribunal, but most magi use Latin because it's Roman, and because most academic books are in that language anyway. The Theban tribunal uses ancient Greek as is very snobby about it.
Mystic symbology can be found in Houses of Hermes: Mystery Cults. House Verditius uses many. Other houses might have them as decorative elements, but symbology is a big thing to magi, it's just something you roleplay, not something inherent in the mechanics.
Circular wards exist in the core rules, there's a particular subgroup of House Ex Misc (Houses of Hermes: Socieatates) which specialists in wards. Solomonic Magic is part of a rival tradition to the Order, and can be found in The Cradle and the Crescent: The Mythic Middle-East. The Order of Suiliman exists.
Other rivals to the orders power exist in Rival Magic.
Hermetic magic is mostly named because it's self contained and sealed. There's none of this foolish worshiping of pagan gods and invoking their powers, your magic comes from YOU. If you're a Merinita, you can bargain with the fae, but you are aware your magic is YOURS first. A Bjonrnaer might beseech their ancestors for aid, but they are aware it's down to them to act first. There is no outside force going to aid you, indeed most of the beings that control magic are sealed away and cannot affect things (and in theory this is fortunate, given they are magic, and do not CARE about humanity, making them essentially entities from HP. Lovecraft's style of work.)