Gertrude Aston Thimelby (1617–1668) was an English poet and author, who became a Roman Catholic nun late in life.
Sir Walter stayed in Spain for six years, where he converted to Roman Catholicism.
In 1645, she married Henry Thimelby from a large recusant family, whose sister Katherine was also a poet,[1] was the wife of Gertrude's brother, Herbert.
In 1658, after the deaths of her husband and only child, Gertrude became a nun at St. Monica's Convent, Louvain, where her sister-in-law, Winefrid Thimelby, a notable letter-writer, was the Prioress.
The Aston and Thimelby families and their literary circle exchanged and collected manuscript poems and letters, known today through the volumes edited by their descendants.