Robert Bertie, 3rd Earl of Lindsey PC FRS (8 November 1630 – 8 May 1701), styled Lord Willoughby de Eresby from 1642 to 1666, was an English nobleman.
He contested Boston in 1661 and was returned to the Cavalier Parliament, in which he sat until he succeeded his father as Earl of Lindsey and Lord Great Chamberlain in 1666.
In a 1677 by-election, Lindsey treated the voters lavishly and secured the election of his candidate against that of the 4th Earl of Exeter, heretofore the predominant interest in the borough.
For a brief period, both Peregrine and their younger brother Charles Bertie sat for the borough, but the Exclusion crisis in 1679 temporarily destroyed Lindsey's influence and both were turned out.
[4] In 1654, he married Mary Massingberd,[2] who died in the late 1650s, after bearing him one daughter:[1] Before 1660, he married again to Elizabeth Wharton (d. 1669), daughter of Philip Wharton, 4th Baron Wharton, by whom he had five children:[1] In about 1670, he married a third time, to Lady Elizabeth Pope, daughter of Thomas Pope, 2nd Earl of Downe and widow of Sir Francis Lee, 4th Baronet.