At the start of hostilities in 1809 the following held the rank of General der Kavallerie:
Archduke John
Henrich Graf Bellegarde
Johann Furst Liechtenstein
As the above probably wore the normal Austrian Senior Staff uniforms, you might want to use your figure as:
Generalmajor Ignaz Pankraz Galeaz Freiherr von Splenyi de Miháldy who commanded a Hussar Brigade with the Frimont Hussar Regiment & Archduke Joseph Hussar Regiment. This Brigade formed part of VIII Armeekorps part of the Armee von Innerosterreich under Archduke John. Picture of Splenyi de Miháldy (obviously when he was much older – probably towards the latter part of his service as Feldmarschalleutnant link
Image of him as a younger man: link
From "A Biographical Dictionary of all Austrian Generals during the Revolutionary and Napoleonic Wars 1792-1815" by Leopold Kudrna, with Biographical Essays by Digby Smith link (information below extracted from entry S98)
Personal Information
Born: Milan (Milano) / Lombardy, 30.04.1772 (note 1)
Died: Miskoltz (Miskolcz) / Com. Borsod / Hungary, 20.03.1840
Family Status
Son of S97
Nephew of S99
Brother of S96
Married: 1807 Maria Szily de Nagy-Szigeth (?-1852)
Promotions
Major: 1797
Oberstleutnant:
Oberst: 1804
Generalmajor: 12.02.1809
Feldmarschalleutnant: 26.07.1813
General der Kavallerie: 21.10.1830
Posts and Offices (Army, Politics, Court)
Adlatus of the Commanding General in Hungary: 1831-1833
Captain of the Hungarian Noble Life Guard: 11.1833 – 20.03.1840
Orders, Awards, Honorary Appointments (Austria)
2nd Colonel-Proprietor of the Hussar Regiment N°2: 1825 – 20.03.1840
I.R. Privy Councillor: 1832 (note 2)
I.R. Chamberlain
Orders, Awards, Honorary Appointments (Foreign Countries)
Bavaria:
Military Order of Maximilian Joseph – KC: 1814
Russia:
Order of St. Anne 2nd cl.: 1814 / 1st cl.
Printed Sources
MilSchem | ÖBL 13, p.44 | Wrede 3, p.238 | Wrede (6), p.62 | Wurzbach 36, p.204f. (wrong: d. 10.03.1840) | WZ, 14.10.1813 | Zivkovic, Generalität, p.40 | Zivkovic, Heerführer, p.43
Internet Sources
Schmidt-Brentano, Generale
Notes
1) ÖBL: … or Szilvás-Újfalu (Slivník) / Com. Semlin (Zemplén) / Hungary, 1768 (?)
2) ÖBL: 1830 (?)