This is in answer to Query 5 in issue 2. The source is GESCHICHTE DE HANNOVER'SCHEN TRUPPEN IN SPANISCHER ERBFOLGKRIEG 1701-1714 by Schwenk.

This is a list of Marlborough's forces on May 30th, about five weeks before the Battle Oudenarde. I have extracted the names of the cavalry regiments and have tried to identify them

STAIR'S BRIGADE

A Spanish Dragoon Regiment (4) Probably D'Audignic's (Spanish Netherlands)
Royal Irish Dragoon Regiment (3) British. Ross's. Later 5th Dragoons
Waterloo Dragoon Regiment (4) Spanish Netherlanders in Imperial service
British Dragoon Regiment (3) Stair's (later 2nd Dragoons, Scots Greys)

KELLUM'S BRIGADE (All British)

Lumley's Horse (3) Later 1st Dragoon Guards
Palme's Horse (2) Later 6th Dragoon Guards
Cadogan's Horse (2) Later 5st Dragoon Guards

SYBOURG'S BRIGADE (All British)

Wood's Horse (2) Later 3rd Dragoon Guards
Schomberg's Horse (3) Later 7th Dragoon Guards

PEUTZ'S BRIGADE (All Luneberg-Hannover troops)

Bothmer Dragoon Regiment (4) Hanoverians in Dutch pay
Voigt Regiment zu Pferde (2) In British pay
Frechapelle Regiment zu Pferde (2) Zelle troops in Dutch pay
Pentz Regiment zu Pferde (2) Hanoverians in Dutch pay.
Schulenburg Regiment zu Pferde (2) In British pay
Leibregimen zu Pferde (2) In British pay
Bulow Dragoon Regiment (4) In British pay

CHANCLOS BRIGADE

Chanclos Ruiters (2) Dutch National Cavalry (CR 19)
Obdam Ruiters (2) Dutch National Cavalry (CR 6)
Van Der Nath Dragoons (4) Holstein-Gottorp in Anglo-Dutch pay

SCHLIPPENBACH BRIGADE

Garde Dragonders (5) Dutch Guard Dragoons (DR 1)

SCHMETTAU BRIGADE

Schmettau Dragoons (4) Brandenburg-Anspach in Dutch pay

PRINS MAURITZ BRIGADE

Karabiniers (4) Dutch National troops (CR 32)
Gardes du Corps (1) Dutch National troops (CR 21)
Blue Guard (2) Garde te Paard Dutch National Regiment (CR 2)

POSERN'S BRIGADE

Dompre Ruiters (2) Dutch National troops (CR 13)
Erbach Ruiters (2) Dutch National Regiment. Wurttembergers (CR 18)
D'Auvergne Ruiters (1) Dutch National Regiment. Hugenots (CR 20)

RECHTEREN'S BRIGADE

Dreisenbergen Ruiters (2) Dutch National Regiment (CR 24)
S'Gravemoer Ruiters (2) Dutch National Regiment (CR 15)
Rechteren Ruiters (2) Dutch National Regiment (CR 22)

BALDWIN'S BRIGADE

Baldwin Ruiters (2)Dutch National Regiment (CR 30)
Vittinghof Ruiters (1) Dutch National Regiment (CR 29)
Van Oyen Ruiters (1)Dutch National Regiment (CR 11)
Tilly Ruiters (2) Dutch National Regiment (CR 4)

? BRIGADE (All Danish troops in British or Dutch pay)

Brockdorff (Horse) (2)
Schmettau (Horse) (2) 5th Jydske National Rytter Regiment
Rantzau Major General (Horse) (2) 4th Jydske National Rytter Regiment
Leibregiment (Horse) (2) Livregiment til Hest.
Wurttemburg Dragoon Regiment (2) Wurttemberg-Oels unit in Danish pay

IN THE SECOND LINE

HACKELBORN'S BRIGADE (All Prussian troops)

Leibregiment Dragoner (4)
Anspach Dragoner (4)
Wittgenstein Dragoner (4)

SPAAN'S BRIGADE (All Prussian troopss)

Kronprinz zu Pferde (3)
Schlippenbach zu Pferde (3)
Heyden zu Pferde (2)
Katte zu Pferde (2)

HAHN'S BRIGADE (All Zelle (Luneberg) or Hanoverian troops)

Von Flu Dragoons (3)Hanoverians in Dutch pay
Reden (Horse) (2)Hanoverians in Dutch pay
St Laurent (Horse) (2) Zelle unit in Dutch pay
Hahn Dragoons (4) Hanoverians in British pay

? BRIGADE

Glinstra Ruiters (2) Dutch National Regiment (CR 28)
Bauditz Dragoons (4) Holstcin-Gottorp in Dutch pay

? BRIGADE

Van Dopff Dragoons (4) Dutch National Regiment (DR 3)
Walef Dragoons (4) A Dutch Free Corps, raised 1703

VAN ECK'S BRIGADE (all Dutch National Regiments)

Oostfreisland Ruiters (2) (CR 14)
Athlone Ruiters (2) (CR 1)
Van Eck Ruiters (2) (CR 3)

STARKENBURG'S BRIGADE

Hesse-Homburg Dragoons (3) Hesse-Kasscl troops in Dutch pay
Pfenninger Dragoons (3) Hesse-Kassel troops in British pay

PRINZ VON WURTTEMBERG'S BRIGADE

Wurttemberg Ruiters (2) Dutch National Regiment. Wurttembergers (CR 23)
Cralingen Ruiters (2) Dutch National Regiment (CR 12)
Hunerbein (Horse) (2) Munster troops in Dutch pay

GROVESTIN'S BRIGADE (all Dutch National Regiments)

Grovestin Ruiters (2) (CR 27)
Nassau-La Leck (2)(CR 17)
Nassau Treisland (2)(CR 26)
Freisland Garde du Corps (1) (CR 2.5)

DEWITZ'S BRIGADE (all Danish Cavalry in British/Dutch pay)

Wurttemberg (2)
Dewitz (2)
Rantzau Leuitenant General(2) 2nd Sjaellandske Rytter Regiment
Utterwick (2)
Wurttemberg-Oels Dragoons(3) This as the rest of the unit previously noted as in the front line

Editor's Note: Alan is the author of, amongst other volumes, WILLIAM III AT WAR, Scotland and Ireland 1689-91, and THE IMPERIAL CAVALRY, 1691-1714, both available from RAIDER GAMES, 120a Potternewton Lane, Leeds 7. The first is £ 4.95, the second £ 3.30, including postage. I believe that two more volumes are now available, WILLIAM III'S DUTCH ARMY, and THE IMPERIAL INFANTRY.