1610-1684: Colonel John St Aubyn
Purchased the Mount as a family home in 1659
m. Catherine Godolphin 

1645-1699: Sir John St Aubyn 
Created the first St Aubyn baronet in 1671
m. Ann Jenkyn 

1669-1714: Sir John St Aubyn
Second baronet
m. Mary de la Hay

1700-1744: Sir John St Aubyn
Third baronet
m. Catherine Morice 

1726-1772: Sir John St Aubyn
Fourth baronet
m. Elizabeth Wingfield 

1758-1839: Sir John St Aubyn
Fifth baronet
m. Juliana Vinnecombe

1783-1862: James St Aubyn
Sir John’s illegitimate son; St Aubyn baronetcy now extinct
m. Sarah White

1799-1872: Sir Edward St Aubyn
Made a baronet in 1866
m. Emma Knollys 

1829-1908: John, Lord St Levan
Made a baron in 1887
m. Lady Elizabeth Townsend

1857-1940: John, Lord St Levan
Second baron
m. (1) Lady Edith Edgcumbe, (2) Julia Wombwell

1895-1978: Francis, Lord St Levan
Third baron
m. Gwendolen Nicolson

1919-present day: John, Lord St Levan
Fourth baron; retired to the mainland in 2003
m. Susan Kennedy

1950-present day: James St Aubyn
Currently living in the castle
m. Mary Bennett