Óslác is a
theophoric Anglo-Saxon given name, cognate to Old Norse
Ásleikr/
Áslákr (Latinised
Ansleicus, modern Scandinavian
Aslak) and to Old High German
Ansleh (
Anslech,
Ansleccus). It is composed of
ós "god" and
lác "play, sport; offering, sacrifice".