Possible Clues:

• Lady from his neighbouring land mostly going with Welshman, oddly
• Welsh moaning disturbed female across the border
• Washing lemon (anag) — native-born inhabitant of Yorkshire, say
• Single man who, it turns out, is a lady
• Native or naturalized inhabitant of England
• Dutch, possibly, working on mag in Welsh?
• Angles - in whom, surprisingly, her ancestors might be included
• Lady born in one part of the UK