Juliana Colyear, Countess of Portmore (née Hele, formerly Juliana Osborne, Duchess of Leeds) (c. 1706 – 20 November 1794) was an English noblewoman. She was the third wife of Peregrine Osborne, 3rd Duke of Leeds, and later the wife of Charles Colyear, 2nd Earl of Portmore, and mother of the 3rd Earl.
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Early life
Juliana was baptised on 1 May 1706 at South Pool, Devon. She was the daughter and heiress of Roger Hele, of Newton Ferrers in Devonshire, and his wife, the former Juliana Prestwood. After her father's death, her mother married Sir Thomas Putt, 2nd Baronet.
Her paternal grandparents were the former Joan Glanville (eldest daughter of Sir John Glanville) and Sampson Hele, MP for Plympton Erle and Tavistock.
Personal life
On 9 April 1725 she married Peregrine Osborne, styled Marquess of Carmarthen, the future duke at St Anne's Church, Soho. He was the second son, but eldest surviving, of Peregrine Osborne, 2nd Duke of Leeds, and the former Bridget Hyde. Osborne's second wife, the former Lady Anne Seymour (a daughter of Charles Seymour, 6th Duke of Somerset), had died in 1722. There were no children from her marriage to the duke, who already had a son and heir from his first marriage, to Lady Elizabeth Harley (a daughter of Robert Harley, 1st Earl of Oxford and Earl Mortimer). He inherited the dukedom from his father in 1729.