Sir Robert Tyrwhitt (died 1581), of Kettleby in Lincolnshire, was an English landowner, politician and administrator whose adherence to Roman Catholicism later led to imprisonment.
[1] He is often confused with Sir Robert Tyrwhitt, his uncle, who not only had the same name and was also an MP but married a woman of the same name (his wife was the other Elizabeth's niece).
[1] Apart from an initial career at the court of King Henry VIII under the tutelage of his uncle and three spells as an MP at Westminster, he spent his life managing his lands and taking part in the affairs of his county.
His marriage to an heiress before 1531 brought him valuable estates and in 1548, his father having died in 1541, he inherited the lands of his grandfather Sir Robert.
His will, made five days before his death, left generous legacies to his wife, children, and grandchildren and his executors included two sons-in-law.