[1] According to several historians, including Vilmos Fraknói, Dezső Véghely, Albert Gárdonyi and György Bónis, Stephen and his family originated from the powerful gens (clan) Ákos, based on an 18th-century biographical writing (Vitae Vespremiensium praesulum) by theologian János Róka.

[4][5] Historian György Rácz proved that an erroneously transcribed copy (by archivist Ádám Rajcsányi) of an original charter of 1307 – in which the diet at Rákos confirmed Charles of Anjou's claim to the Hungarian throne – caused the error; Rajcsányi incorrectly resolved the abbreviation "plts" ("praelatus", instead of "palatinus"), while the original text refers to the influential secular baron Stephen Ákos.

[7] Aladár Szabó and György Rácz refused this career outline, distinguishing three or four clerics named Stephen at the turn of the 13th and 14th centuries.

[8] Sometime in the second half of 1298, Stephen Kéki was elected provost of Veszprém replacing Andronicus, who swapped his position in order to become guardian of Székesfehérvár.

[11] Stephen made an agreement with the cathedral chapter in 1313, during which he handed over to the canons half of the tax due to him from the peoples who had settled in Veszprém Castle for the purpose of defending the episcopal fort.