William and Jane Yeats were John Butler Yeats’s parents, William and Jack’s grandparents. Son of Reverend John Butler, William (1806-1862) was born in the surroundings of Dublin Castle, where his maternal grandfather, William Taylor, was Chief Clerk in the Chief Secretary’s office. William attended Trinity, married Jane Grace Corbet (1811-1876) in 1835, and became clergyman. After a brief period in the parish of Moira, County Down, he became rector of Tullylish in the same county. Even though he remained technically Rector, he left his living inexplicably early in 1853 and stayed away from the Parish. He died suddenly in Sandymount Castle, the house of his brother-in-law, Robert Corbet. John Butler Yeats remembered his father as charming but unrealistic ‘he made castles even in Ireland, as others did in Spain’ (R. F. Foster, W.B. Yeats, A Life, 1998, p. 2).