28th March is the Feast of St Alkelda, a lady who has two churches named after her, one in Middleham, the other in Giggleswick. That seems clear enough. BUT there does not appear to be a St Alkelda. “She” may even be a well, there being a theory that the name Alkelda derives from an old word for holy well or spring.
To read much more on this interesting matter, go to the Darlington & Stockton Times’ article, from the 27th March 2015.