Sillian

Sillian (also sometimes misspelled as "Silian") is a surname of Irish origin. It is an anglicized form of the Gaelic name Ó Síleáin, meaning "descendant of Síleán." Síleán is a personal name, a diminutive of Síol, meaning "seed" or "progeny."

The name is primarily found in counties Cork and Kerry in southwestern Ireland. Emigration from Ireland, particularly during the Great Famine in the mid-19th century, led to the spread of the Sillian name to other countries, including the United States, Canada, Australia, and the United Kingdom.

Variations in the spelling of the name are common due to the anglicization process and regional dialectical differences. Other forms of the name include Sheelan, Sheelan, Shelin, Shillin, and Silleen.

Notable individuals with the surname Sillian are relatively scarce in published historical records, suggesting it is a relatively uncommon name. Researching genealogical records within the aforementioned Irish counties is the most effective method of tracing individual Sillian lineages.