The church's original dedication was to St Kew, a Cornish saint believed to have been born in Llangua.

[1] The present church dates from the 14th century, with restorations in 1889 and 1954–1955.

[2] In 1886 the living of Llangua was merged by order in council with that of Kentchurch across the Wales–England border in Herefordshire.

[4] The 20th century restorations were funded by Ivor Bulmer-Thomas, former chairman of the Redundant Churches Fund, in memory of his wife.

[5] Much of the interior was remodelled in the 20th century renovations and includes a painted partition with four panels which is said to have come from a demolished chapel in Whitford, Devon.