The first part of the name of the village may be derived from the
Old English for 'gate by the ford'. Millicent comes from Millicent de Clinton, who owned the
manor in the 12th century and was the wife of William de Clinton; the suffix distinguishes the manor from its neighbour to the south,
Lydiard Tregoze. Lydiard Manor is mentioned in the
Domesday survey of 1086, owned by
Geoffrey de Clinton, with 25 households. There was an extensive Romano-British ceramic manufacturing industry on and around Shaw Ridge, on land formerly within the two Lydiard parishes, mainly in the 2nd century. Manor Farm has an 18th-century
dovecote; the present Manor House was built in 1965–6 on the site of an earlier house which burned down in 1880. A
Primitive Methodist chapel was built in 1863 at Lydiard Green, of red brick in plain classical style. The building was still in use in 2004 but by 2009 had become a private house. A
National School was built at The Butts in 1864, and enlarged several times; in 1902 the attendance was 115. Children of all ages were educated until 1930, when those over 11 transferred to Purton. Enrollment fell, then increased in 1965 on the closure of the school at Lydiard Tregoze. A new school was opened on the other side of the lane in 2011. In the 19th century the parish boundary in the northeast was the
River Ray, beyond the Cheltenham railway. This area was subsequently developed, largely for housing, as the Swindon suburbs of Shaw, Middleleaze, Nine Elms, Hillmead, Roughmoor, Peatmoor and Common Platt, all within the area known as
West Swindon, which gained civil parish status in 2017. == Parish church ==