Walter Stewart, 3rd High Steward of Scotland was born circa 1198 to Alan fitz Walter, 2nd High Steward of Scotland (1140-1204) and Alesta of Mar (-c1204) and died 1246 of unspecified causes. He married Bethóc Angus MacGilcrist (1184-1270) .
Children
| Name | Birth | Death | Joined with |
| Margaret Stewart (1206-1255) | 1206 Dundonald, Ayrshire, Scotland | 1255 Carrack, Galloway, Scotland | Niall Carrick (1202-1256) |
| Beatrix Stewart (c1210-) | |||
| Alexander Stewart, 4th High Steward of Scotland (1214-1283) | 1214 | 1283 | |
| John Stewart (c1216-1249) | |||
| Walter Balloch Stewart (c1218-1296) | 1218 | 1296 | Mary of Monteith |
| Euphemia Stewart (-c1267) | |||
| Robert Stewart | |||
| Elizabeth Stewart (c1210-) | 1210 | Maldouen of Lennox | |
Footnotes (including sources)
| ‡ General |