There are more or less established names for all the pieces with single steps in a mirror symmetric pattern. Some of them may just be alternate English translations from Japanese, some genuinely different. Most names come from Shogi and Shogi variants, a few are Western names. I give the name I consider most standard and best understood first:
fW (your Soldier): (Shogi) Pawn, Foot Soldier
fsW (your Sergeant): Korean (Janggi) Pawn, Chinese Pawn (after crossing the river), Drunken Soldier (Jelliss)
fF (your Officer): Stone General or Sekisho, Goose (Fox and Geese, Jelliss)
fWfF (your Colonel): Iron General, compare also Graz Pawn (Chess problems)
fbWfF (your Brigadier): Copper General (Dai Dai Shogi), Flying Goose (Taikyoku Shogi) Climbing Monkey (Wa Shogi, Takyoku Shogi)
fWF (your Admiral): Silver General
fsWfF (your Tactician): Evil Wolf or Akuro, Panthan (Jetan)
WfF (your General): Gold General, Tokin
fsWF (your Marshal): Drunk Elephant or Suizo. Note that Marshal is one of the common Western names for the Rook-Knight compound piece.
Not in your list:
FfbW: Ferocious Leopard or Mohyo, Jelliss translates the same Japanese word as
Horrible Panther.
J.P.Jelliss "All the Kings men": https://www.mayhematics.com/v/gm.htm#G This has names for all "generals", i.e., one step movers with left-right symmetrical moving patterns
There are more or less established names for all the pieces with single steps in a mirror symmetric pattern. Some of them may just be alternate English translations from Japanese, some genuinely different. Most names come from Shogi and Shogi variants, a few are Western names. I give the name I consider most standard and best understood first:
fW (your Soldier): (Shogi) Pawn, Foot Soldier
fsW (your Sergeant): Korean (Janggi) Pawn, Chinese Pawn (after crossing the river), Drunken Soldier (Jelliss)
fF (your Officer): Stone General or Sekisho, Goose (Fox and Geese, Jelliss)
fWfF (your Colonel): Iron General, compare also Graz Pawn (Chess problems)
fbWfF (your Brigadier): Copper General (Dai Dai Shogi), Flying Goose (Taikyoku Shogi) Climbing Monkey (Wa Shogi, Takyoku Shogi)
fWF (your Admiral): Silver General
fsWfF (your Tactician): Evil Wolf or Akuro, Panthan (Jetan)
WfF (your General): Gold General, Tokin
fsWF (your Marshal): Drunk Elephant or Suizo. Note that Marshal is one of the common Western names for the Rook-Knight compound piece.
Not in your list:
FfbW: Ferocious Leopard or Mohyo, Jelliss translates the same Japanese word as
Horrible Panther.
Some sources for the piece names:
Christine Bagley-Jones: Fairy Pieces Part 1, https://www.chessvariants.com/ideas/fairy-pieces-part-1
J.P.Jelliss "All the Kings men": https://www.mayhematics.com/v/gm.htm#G This has names for all "generals", i.e., one step movers with left-right symmetrical moving patterns
Wikipedia: https://en.wikipedia.org/wiki/List_of_fairy_chess_pieces