The Primary Chronicle (PVL) mentions two men named "Aepa" under the year 6615 (1107–1108; columns 282.25–283.3):[a][b] During the same month of this year [January 1108], Vladimir [Monomakh], David [Sviatoslavich], and Oleg [Sviatoslavich I of Chernigov] went forth to meet Aepa and his namesake[c] and made peace.
[3] The son of Oleg Sviatoslavich is understood to be Sviatoslav Olgovich, who thus married a daughter of Aepa son of Girgen[2] (literally "daughter of Aepa, granddaughter of Girgen").
In the so-called Testament of Vladimir Monomakh, which is attached to the PVL only in the Laurentian Codex, the name "Aepa" occurs twice more, although it appears the author thought there was only one Aepa and not two: The latter event is partially corroborated by the continuation of the PVL in the Hypatian Codex sub anno 6621 (April 1113), although it doesn't mention any "Aepa":[5] 'When the Polovtsi heard of Sviatopolk's death, they gathered and marched on Vyr (a fortress on the river Seym in the principality of Pereyaslavl').
But Vladimir gathered his sons and cousins, marched on Vyr, joined his forces with Oleg's, after which the Polovtsi fled.
'[7] Aepa may be a slavicization of the Arab name Ayyub (Persian: ايوب خان, Tatar: Äyyüb [æɪˈjyp]).