Lillias is a variant of Lilias, a feminine given name with origins in Scotland.
Etymology
Lilias is considered a Scottish form of Lillian, emerging around the 16th century. Lillian itself likely originated as a diminutive of Elizabeth, meaning “my God is an oath”. Alternatively, Lillian may be an elaborated form of Lily, from the Latin lilium.
Notable Bearers
While uncommon today, Lillias has been borne by several notable figures, including Lillias Hamilton (1858–1925), a British doctor, and Lillias Maitland (1862–1932), one of the first women to graduate from the University of Edinburgh in 1893. Other beareres include Lillias MacDonald (1885–1961), an American college dean, and Lillias Trotter (1853–1928), a Christian missionary in Algeria.
Other Languages & Cultures
Sources: Wikipedia — Lilias