Sheilagh is an Irish female given name derived from the Gaelic name 'Síleach', which means 'graceful'. It was popularized during the Celtic Revival of the late 19th and early 20th centuries, along with other names of Irish origin such as Kathleen and Eithne. The name Sheilagh is often Anglicized to Sheila or Shiela, but it maintains its unique charm and heritage rooted in Gaelic culture.
Sheilagh was a popular name for girls born between 1952 and 1989, with a total of 56 babies given this name during that period. The name's popularity peaked in 1963 with 10 births, but it remained relatively consistent over the years, with an average of about 7 births per year across the decades.