Pierre de Grandison, Sire de Grandson, was born before 1195 to Ebald IV de Grandson (bef1156-aft1235) and Béatrix de Genève (c1172-c1219) and died before 15 July 1259 of unspecified causes. He married Agnes von Neuenberg (-c1259) .
Children
| Name | Birth | Death | Joined with |
| Othon I de Grandson, 1st Baron Grandison (c1245-1328) | |||
| Girard de Grandson (-c1284) | |||
| Jacques de Grandson (c1250-1290) | 1250 | 31 July 1290 | Béatrice de Neufchâtel (bef1290-) |
| Henri de Grandson (-1286) | |||
| William de Grandison, 1st Baron Grandison (-c1335) | 1262 Neuchâtel, Neuchâtel, Switzerland | 27 June 1335 Cassington, Oxfordshire, England, United Kingdom | Sibyl de Tregoz (-1334) |
| Amadeus de Grandson (-c1300) | |||
| Jordane de Grandson (-aft1289) | |||
| Guillemette de Grandson (-c1319) | |||
Footnotes (including sources)
| ‡ General |