Meaning A boy's name of Welsh origin, it means "Welsh form of Charles 'manly' Origin of Siarl Welsh +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Siarl Similar Names Chip Charlemagne Carles Kalle Kjell Sior Sadwm Selyf Siencyn Powell Year by Year Popularity of Siarl