Frederick Mason Trench, 2nd Baron Ashtown DL (25 December 1804 – 12 September 1880)[1] was an Irish peer and magistrate.
[2] While his claim to his uncle's title was admitted only in 1855,[3] he actually succeeded per special remainder on the latter's death in 1840.
[6] He lived much of the year at Castle Oliver, which was built in 1845 by his second wife and her sister Isabella.
[9] Trench died, aged 75, at Clonodfoy (otherwise known as Castle Oliver) and was buried at the family's mausoleum at Woodlawn, County Galway, a week later.
[10] His second surviving son Cosby, who inherited Castle Oliver, was a soldier and magistrate.