Jobst Jošt III von Gallenberg - Jobst III von Gallenberg's father : Jacob or Christoph ?

Secondary sources disagree on the identity of Jobst III von Gallenberg's father :

Johann Hübner (*) claims his father is Jacob III von Gallenberg, whereas Bucelinus (**) and the Gallenberg monography by Labaci (***) favour Christoph von Gallenberg (Jacob III's brother).

A contemporary (1543) primary source conserved in the Kärnten Landesarchiv, presenting Katherina von Rain as the widow of Christoph von Gallenberg and mother of Jobst von Gallenberg, confirms the latter hypothesis

Sources :
(*) Genealogische Tabellen: Nebst denen darzu gehörigen Genealogischen Fragen, Zur Erläuterung Der Politischen Historie, Johann Hübner, 1728, pp. 906-909 https://books.google.fr/books?id=P1RnXUf47ksC&pg=PA906

(**) Bucelinus : https://books.google.fr/books?id=WP5PAAAAcAAJ&pg=RA9-PA300 and https://books.google.fr/books?id=Vp8OTBG2jeMC&pg=RA1-PA94

(***) Labaci : https://books.google.fr/books?id=vbxUAAAAcAAJ&hl=fr&pg=PA21

(****) Kärntner Landesarchiv Ständisches Archiv, Urkunden AT-KLA 457-B-470 F St, in: monasterium.net, URL http://monasterium.net/mom/AT-KLA/KLA-457/AT-KLA_457-B-470_F_St/cha...