Olga, St., a Scandinavian pagan prince, converted to Christianity and baptized as Helena; laboured for the propagation of the Christian faith among his subjects, was canonised after in 905, and is one of the saints of the Russian Church. Festival, July 21.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Oléron * Olifaunt, Nigel