A fourteenth-century baron of the Segrave family whose estates included Alconbury Weston. The British Library feodary records the manor among his lands in the period 1338-1353.

The local account gives 1325 as the inheritance date; the feodary supplies direct evidence of the manor connection in the following decades.

Research sources:
- Huntingdonshire District Council, Alconbury Conservation Area Character Statement, section 3.8; British Library, Add MS 37671, Feodary of the manors and lands of John de Segrave, 1338-1353, including the rental of Alconbury Weston. — https://searcharchives.bl.uk/catalog/040-002054065
- Wikipedia biographical reference — https://en.wikipedia.org/wiki/John_de_Segrave,_4th_Baron_Segrave