Reginald of Burgundy
|Count of Montbéliard, jure uxoris|
|Noble family||House of Ivrea|
|Spouse(s)||Guillemette of Neufchâtel|
|Issue||Othenin, Count of Montbéliard|
Joanna of Burgundy
|Father||Hugh III, Count of Burgundy|
|Mother||Adelaide, Countess Palatine of Burgundy|
After Reginald's death in 1322, his daughter Joanna inherited his lands, due to the insanity of her elder brother.
In 1282, Reginald married Guillemette de Neufchâtel (1260-1317, heiress of the counties of Montbéliard and Belfort by her great-grandfather Thierry III de Montbéliard 1205-1283), with whom he had a son and four daughters:
- Othenin de Montbéliard (Othenin the Mad, d. 1339) – count of Montbéliard under the guardianship of his uncle due to his mental handicap.
- Agnès de Montbéliard (d. 1367) – married Henri de Montfaucon; they received the county of Montbéliard on the death of her elder brother.
- Jeanne de Bourgogne (d. 1349) – married thrice: (1) Ulrich III, Count of Ferrette (d. 1324), and had four daughters of whom two survived, Joanna of Pfirt (wife of Albert II, Duke of Austria) and Ursula; (2) Rodolphe-Hesso of Zähringen, Margrave of Baden-Baden, and had two daughters, Margaret and Adelaide; then (3) count Guillaume II of Katzenelnbogen.
- Marguerite de Montbéliard – married Guillaume II d'Antigny, lord of the Château de Sainte-Croix (fr).
- Alix de Montbéliard, Lady of Montaigu (Jura), Lons (in part), and Montfleur – married her cousin Count Jean II of Chalon-Auxerre (d. 1363); their descendants succeeded as Lords of Montaigu (Jura); their son Jean III was the ancestor of the Counts of Auxerre and Counts of Tonnerre.
- (in French) Le Roman d'une Principauté, D. Seigneur. - Éditions : Cêtre (Besançon).