The reliable reference is always the BH; (but also my site which borrows news from the BH) even if in the first edition the name is not reported, but only the noble title (just as in one of the first editions I have at home): Artaria, CATALOGO 710, Sammlung Helferich, Helferich 22,1b:
XII Variation pour clavecin ou piano-forte avec un violoncelle obligé, sur un thème..... etc.....
Composed and Dedicated to Her Highness Madame the Princess of Lichnowsky, née Countess of Thun
who is then
Maria Christiane Fürstin von Lichnowsky, geb. Gräfin Thun-Hohenstein
wife of Lichnowsky
http://www.beethoven-haus-bonn.de/sixcms/detail.php?id=15242&template=dokseite_digitales_archiv_en&_eid=1510&_ug=Other%20orchestral%20works&werkid=43&dokid=i3110&opus=op.%2043&mid=Works%20by%20Ludwig%20van%20Beethoven&sucheinstieg=&seite=1
so
The Kinsy-Halm:
Wo0 45 Twelve Variations (G major) on a theme from Handel's Oratorio ..Judas Maccabaeus for piano and cello
dedicated to Princess Christiane v. Lichnowsky (GA: No. 110 = Series 13 No. 6)
Period of composition: presumably 1796, in the year of composition of the Cello Sonatas Opus 5. Further details are unknown; drafts are not proven by Nottebohm. - The theme of the variations is the well-known victory chorus "See the conqu'ring hero comes" ("Seht, er kommt mit Preis gekrönt"), which Handel subsequently took from his Oratorio "Joshua" (1747) into the score of "Judas Maccabaeus," which had already been composed in 1746.
Autograph: Vienna, Gesellschaft der Musikfreunde (gift from Aloys Fuchs). Heading: "Variations par j l. v. Beethoven15 12-line sheets (30 pages) in landscape format. Pagination handwritten, odd-numbered pages in the lower right corner, even-numbered pages in the lower left corner.
Cf. p. 86 in Mandyczewski's »Zusatzband zur Geschichte der G. d. M.«; No. 603 in the Guide to the Centenary Exhibition Vienna 1927.
Announcement of publication: not determined. According to Artaria's VN. 710, probably published in the summer or autumn of 1797, as the Artaria publisher items with numbers 703-705, 708 and 709, 713, 715-717, 719 and 720 are all in the Wiener Zeitung No. 80 of the 4th.
So Christiane (even if Christine is passed down by many sources; on my site I had left Christine because Biamonti reports it from one of the last Bruers catalogs, in others the first name is omitted).
In practice, I made a correction to Biamonti; I would say that Christiane is more correct.
But how beautiful that they check these trivial details! Well done, well done indeed!
Friendship,