Llangeinwen is a village on the island of Anglesey in the community of Rhosyr. Until 1984 it was a community itself.https://www.ukbmd.org.uk/reg/districts/ynys%20mon.html
It is the location of St Ceinwen's Church, Llangeinwen.
Welsh educator and founder of Aberystwyth University, Hugh Owen was born in the village.
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