Elionaid is of Irish origin, derived from the ancient Irish given name Éileannán, which consists of two elements: 'Éile' meaning "swift" and 'án' meaning "little". This name was popular among the early Irish nobility, reflecting its prestige and antiquity. It is often anglicized as Eleanora or Leonora, though it retains a distinctively Celtic character.
"Elionaid is quite rare, with only 11 babies named this way annually in 2006."