The name, before the family
The trail begins as a sound: Tidda, an Anglo-Saxon personal name built on Old English tíd, "time, season." It survives on the map as the twin fenland parishes of Tydd St Mary (Lincolnshire) and Tydd St Giles (Cambridgeshire), facing each other across the Shire Drain, with churches standing since 1084 and about 1200. Local tradition holds that Nicholas Breakspear served as Tydd's rector before becoming Pope Adrian IV in 1154, the only Englishman ever to hold the office. Then the people of Tydd start signing their village's name: Thomas de Tid in the Hundred Rolls of Cambridgeshire, 1273; John de Tydd of Norfolk, 1353; Johannes Tydde in the Yorkshire poll tax of 1379.
Tydd St Mary & Tydd St Giles
Tydd St. Giles is the northernmost parish in Cambridgeshire, six miles north of Wisbech; the Shire Drain divides it from its Lincolnshire twin, Tydd St Mary, on the river Nene. The church of St Giles was raised in 1084 on a natural rise in the fens; St Mary's oldest fabric dates to about 1200. The villages' name is traced to the Saxon Tid.
Local tradition in both parishes holds that Nicholas Breakspear, later the only English pope, Adrian IV (1154), served as rector or curate at Tydd before Rome.
The medieval bearers of the name
The surname has two candidate origins, both pointing to eastern England: the Anglo-Saxon personal name Tidda (from Old English tíd, "time, season," the root of the site's tid-man, keeper of a tithing), or the Tydd villages themselves.
The first recorded bearer is Thomas de Tid, 1273, in the Hundred Rolls of Cambridgeshire under Edward I. After him the trail runs through John de Tydd of Norfolk (27 Edward III, 1353) and Johannes Tydde in the Poll Tax of Yorkshire, 1379.