Mathilde Welf von Braunschweig-Lüneburg was born circa 1345 to Wilhelm II. von Braunschweig-Lüneburg (c1300-1369) and Marie and died 1410 of unspecified causes. She married Ludwig von Braunschweig-Lüneburg (?-1367) 1355 JL . She married Otto von Holstein-Schauenburg (c1330-1404) 25 June 1368 JL .
Children
| Name | Birth | Death | Joined with |
| Adolf IX. von Holstein-Schauenburg (c1370-1426) | 1370 | 1426 | Helene von Hoya (c1399-1426) |
| Wilhelm von Holstein-Schauenburg (1379-1391) | |||
| Elisabeth von Holstein-Schauenburg | |||
| Adelheid von Holstein-Schauenburg | |||