Llangelynnin may refer to:
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Llangelynnin, Conwy
Llangelynnin (; Welsh for ''The church of Celynnin'') is a former parish in the Conwy valley, in Conwy county borough, north Wales. Today the name exists only in connection with the church, a school in the nearby village of Henryd, and the ne ...
, a former parish in Conwy County Borough, Wales
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Llangelynnin, Gwynedd, a village and community in Gwynedd, Wales
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