In the 1220s the family seem to have rebelled against the Crown and forfeited their lands, but by 1242–43 Thomas Goher had recovered the estate.

Ivo died that same year, and the Crown allowed de Beaumont to keep the Grandmesnil estates.

When their son Roger de Quincy, 2nd Earl of Winchester died in 1264 Sibford Gower passed to his eldest daughter Ellen or Helen, wife of Alan la Zouche.

Lovell survived Richard's defeat but Henry VII ordered the forfeiture of all his titles.

In 1774 the inclosure award for Sibford Gower divided 1,666 acres (674 ha) between 48 landholders.

The largest award was 257 acres (104 ha) to New College, Oxford, which had held the rectory of Swalcliffe since 1389[3] and over the years had extended its estates into Sibford Gower.

A Quaker congregation was established in the village by 1669, when it met in the home of the clockmaker Thomas Gilkes.

Thomas Gilkes was born in Sibford Gower in about 1665[8] and pioneered clockmaking in north Oxfordshire.

[9] John Fardon (1700–43) of Deddington also served his apprenticeship with the elder Thomas Gilkes in Sibford.

John Wells' date of birth is unknown but he was married in the Friends' Meeting House in 1785.

[11] From 1827 he traded in Whitechapel in East London, but in 1832 he returned to Sibford Gower where he remained for the rest of his life.

The vicar of Swalcliffe complained in 1837 that the charity was mismanaged, its buildings were ruinous and the master and his wife were not competent.

Quakers and Wesleyans in the parish held a public meeting in 1891 at which they objected to the school being classified as Church of England.

The Charity Commissioners agreed that there was no specific requirement for its pupils to be taught in accordance with the Church of England.