Following his first wife's death, Sir John Arundell married, by papal dispensation dated 7 December 1503, Katherine Grenvile (born 1489x93), the youngest of the eight children of Sir Thomas Grenville of Stowe, Kilkhampton, Cornwall, by his first wife, Isabella Gilbert.

In the end, Jane did not marry, but served as a gentlewoman in the household of Queen Mary, and eventually returned to Lanherne, her father, Sir John Arundell (c. 1474 – 8 February 1545), having provided for her financially.

[11] Mary Arundell was earlier reputed to be among the learned women of her time[12] as the alleged translator of the Sayings and Doings of the Emperor Severus and the Select Sentences of the Seven Wise Men of Greece.

[13] However, according to Grummitt, 'The claims once made for her literary attainments have proved to be unfounded; the translations of classical texts surviving among the royal manuscripts in the British Library, once attributed to her, are children's exercises written by her stepdaughter Mary, later duchess of Norfolk'.

A lead coffin, said to contain her remains, was found at Arundel Castle in 1847, and is now buried beneath the floor of the Fitzalan chapel there.