Rhidian
[file:Llanrhidian church and cottages-geograph.org.uk-3545022.jpg|thumb|right|Llanrhidian church and cottages]Rhidian was a 6th-century Welsh Pre-congregational Saint who is often associated with St Illtyd.
Rhydian might be a corruption of 'Tryrulhid’, who was St Illtyd's wife. However, there are also legends about a male Celtic monk, by this name, who went on pilgrimage to St Davids.
Rhidian is the patron saint of Llanrhidian in Wales.