Majority of the historians, including Mór Wertner, Zoltán Kordé and Attila Zsoldos considered, Bogomer (or Bohumír) was born into the gens (clan) Ludány, which owned landed properties primarily in Nyitra County.
[1][2] According to the Gesta Hunnorum et Hungarorum written by chronicler Simon of Kéza, the Ludány kindred originated from Bohemia, which claim is strengthened by the frequency of Slavic-origin personal names within the kinship.
[4] Bogomer belonged to Duke Béla's confidants, who strongly opposed his father King Andrew II "useless and superfluous perpetual grants" which caused the derogation of the royal power in the realm.
Béla was made Duke of Slavonia in 1220, and Bogomer was member of his ducal court, along with other young courtiers, for instance Denis Türje, Paul Geregye and Pousa, son of Sólyom.
Kordé argued Andrew II granted autonomy to colonial Saxons of Hermannstadt region in Southern Transylvania, when issued Diploma Andreanum (1224), just before the following year, when he launched a campaign against the Teutonic Knights, who had attempted to eliminate his suzerainty.
Bogomer played an important role in the suppression of Austrian units, shortly thereafter he led a royal army send to help Bolesław V the Chaste (son-in-law of Béla IV, the Hungarian king) attacked by Konrad I of Masovia.