Who married George FitzClarence, 1st Earl of Munster?

Mary Wyndham married George FitzClarence, 1st Earl of Munster on October 18, 1819. George FitzClarence, 1st Earl of Munster was 25 years old on the wedding day (25 years, 8 months and 19 days). Mary Wyndham was 27 years old on the wedding day (27 years, 1 months and 19 days). The age gap was 1 years, 5 months and 0 days.

The marriage ended in ?.