Originally from the area of Wellibi, near Grantham, the Welbys could trace their ancestry back to the Conquest. William Welby† (d. 1657), who was elected as a Parliamentarian but prevented from taking his seat by Cromwell, acquired the manor of Denton, near the Leicestershire border, in 1648. This Member’s grandfather represented Grantham, 1802-6, as did his father, who headed the local Red interest, 1807-20, and his father-in-law Sir Montague Cholmeley, who was returned at a by-election, 1820-6. At the 1830 general election Welby came forward on the family interest in place of his brother-in-law Montague Cholmeley, who had assured him that he intended to stand down. It was rumoured that he would be returned unopposed, but Cholmeley’s decision to offer again forced a contest. During his campaign he declared his principles to be those of his father, citing his ‘attachment to church and state’, but refused to give ‘any pledge as to my future conduct’. He topped the four-day poll and was returned with Cholmeley.
He was listed by the Wellington ministry among their ‘friends’, but he voted against them in the crucial division on the civil list, 15 Nov. 1830. Yet he divided against the second reading of the Grey ministry’s reform bill, 22 Mar., and for Gascoyne’s wrecking amendment, 19 Apr. 1831. On account of these votes, the local press did not expect him to offer again at the ensuing general election, but he returned to Denton and immediately offered an unrepentant address, 24 Apr.
At the 1832 general election he successfully contested Grantham, where he sat as a Conservative until his retirement in 1857, when he was replaced by his eldest son William (1829-98). In compliance with the will of Gregory Gregory of Harlaxton, near Grantham, he added the name of Gregory to his own in 1861. He died at Denton in August 1875. By his will, dated 18 Oct. 1873, he left his wife his leasehold London house in Upper Belgrave Street and an annuity of £1,000. He gave £22,000 to each of his four surviving younger sons and £5,000 to each of his two daughters in addition to their ‘ample’ marriage settlements. The residue and family estates passed to William, his successor in the baronetcy, who was Conservative Member for Grantham, 1857-68, and South Lincolnshire, 1868-84.
