He married Margaret Collett Dalgleish on 29 August 1837 at St. Giles-in-the-Field, London and had 10 children, all of whom were born in
Oporto, Portugal. He married four of his daughters to
port wine shippers. • Francis Pedro Gauntlett Fladgate (25 March 1839 – 9 September 1888). Employed by Taylor, Fladgate & Yeatman. Married Laura Louisa McMaster in 1864. Had issue. • Margaret Ellen Fladgate (1840 – 5 April 1923), christened on 29 December 1840. Married firstly António d'Almeida Campos on 23 April 1864 and had issue. Married secondly Thomas William Murray-Allan and had issue. • Catherine Mary Fladgate (1842 – 27 July 1903), christened on 22 May 1842. Married Joseph James Forrester, son of
Joseph James Forrester, Baron Forrester, on 6 November 1862. Had issue. • Harriette Forbes Fladgate (1845), christened on 22 March 1845. • Marian Grimston Fladgate (1847 – 30 March 1932), christened on 2 March 1847. Married Albert Charles Frederick Morgan, of Morgan Brothers & Co., on 18 October 1881. Had issue. • Helen Florence Fladgate (1849 – 14 December 1925), christened on 19 June 1849. Married Pedro Gonçalves Guimaraens, of
Fonseca Guimaraens, on 18 December 1867. Had issue. • Janet Young Fladgate (1852), christened on 7 April 1852. Married Charles Wright, resident Director of Croft & Co. Had issue. • Elizabeth Edith Jebb Fladgate (1854 – 10 September 1855), christened on 19 July 1852. • Reginald Hugh Fladgate (1856 – 14 April 1863), christened on 27 July 1856. • Henry Claude Fladgate (1858), christened on 5 November 1858. ==Portugal and port wine==