Meaning A girl's name of Gaelic origin, it means "Gaelic Form of Sheila." Origin of Silis Gaelic , Irish Popular Middle Names Robert Pronunciation 🔊 Listen Silis Similar Names Rhoswen Afkica Barabell Deardriu Eideann Eihhlin Ghleanna Marsali Mildread Ethna Year by Year Popularity of Silis