Sir Thomas belonged to a distinguished family, long-established in Kent, which, early in the 14th century, had split into three main branches: namely, Cobham of Cobham, Cobham of Randall and Cobham of Sterborough. Members of all three branches were summoned to Parliament, including Sir Thomas’s grandfather,
Stephen Cobham
† (d.1332-3), but he was the only one of the Randall line ever to sit in the Lords. As his direct descendant, Thomas inherited after the death of his father in 1361 the manor of Randall, Allington castle and various lands and rents, and in the following year he agreed with his brother John that the younger man might have the family estate at Hever which otherwise, owing to its being held by gavelkind tenure, would have been split up between them. Thomas was only 19 when his father died, but nevertheless, in October 1362, the King took his fealty for tenements at Boxley which were held of the Crown in chief by the service of finding a horse and a sack with a brooch for the King’s wars in Wales, after it was decided that such a tenure did not permit the Crown rights of wardship.
Within a few years Cobham married Maud, the only daughter of Thomas Morice, the London lawyer, and in 1367 he settled on her as jointure his manor of Randall. In the will he made in the following year Morice left ‘his son called Cobham’ his own leasehold interest in the manor, together with all his armour, and to Maud three dorsers, three pieces of matching silver and other goods. Maud was his heir to substantial properties in north Kent at Wrotham, Trottiscliffe and elsewhere, 14 messuages and rents in Stepney, Bromley and Hackney, Middlesex, and some meadowland in Stratford, Essex. She and Cobham sold or leased out some of these holdings, but for the most part her inheritance was retained by her husband after her death in 1380, and in due course passed more or less intact to their elder son.
In the early 1370s Cobham twice embarked for Ireland for service with the King’s lieutenant, William of Windsor, having in the meantime in August 1372 joined the retinue of Thomas, earl of Warwick, for the naval expedition intended to relieve La Rochelle.
Thomas atte Raven
† of Rochester, took him and certain other notables, including John Freningham and James Peckham, captive. Atte Raven offered his prisoners their freedom, provided that they took an oath to join him and his followers, but whether they did that or sought safety in some other way, is unclear. Cobham subsequently took part in the repressive measures to stamp out further insurrection.
Cobham died, aged about 50, on 8 Feb. 1394, leaving as his heir his elder son (Sir) Reynold (1372-1405). He was buried in Birling church.
