The following account of BELLEME and DOMFRONT is a compromise taken from the various published accounts, which seldom agree on facts. It may be safely assumed it contains errors.

BELLEME COUNTY

The dating of the first six persons described present unresolved difficulties, especially
[TALV292] Hildeburge who would appear to be a generation younger than her brother [TALV291] William
which would be alright if their father had been married twice
and they were simply half-siblings.

[TALV251] Count Fulcuin of Creil m. Rothias de Carbonais
. [TALV261] Seigneur Yves I de Creil m. Geile
. . [TALV271] Seigneur Fulk de Creil m. Rolias
. . . [TALV281] Count Ives II of Alencon & Domfront m. Godehilde de Ponthieu
. . . . [TALY291] Yves de Belleme m. ?
. . . . . [TALY301] Renard de Chateau-Gontier m2. Beatrix du Perche
. . . . . . [TALY312] Gervaise de Chateau-Gontier m. [MAYE342] Count Geoffroy II of Maine
. . . . [TAVL292] Hildeburge de Belleme m. [MAI1301] Seigneur Haimon d'Argentre
. . . . [TALV293] Godehildis de Belleme m2. [BEAU341] Vicomte Raoul III du Maine
. . . . [TALV291] Sire William d'Alencon m. Dame Mathilde de Conde-sur-Noireau
. . . . . [DAMF321] Count Warin of Alencon m. ?
. . . . . . [DAMF332] Adelise d'Alencon m. [PERC331] Count Rotrou I of Mortagne in Perche
. . . . . [TALV301] Count William I of Alencon & Belleme m. Mathilde de Ganelon
. . . . . . [TALV312] Count William II of Alencon m1. [BEAU372] Haberga de Beaumont
. . . . . . . [TALV322] Countess Mabel of Alencon & Belleme m. [TMON331] Earl Roger of Shrewsbury

41. [TALV251] Fulcuin, Comte de Creil, married Rothais de Corbonais

40. [TALV261] Yves I, Seigneur de Creil, married Geile. He died 977.

39. [TALV271] Fulk, Seigneur de Creil, married Rolias

38. [TALV281] Ives II, Seigneur de Creil & Belleme, Count of Alencon & Domfront, married Godehaut/Godchilde de Ponthieu, and died c.993.

34. [TALY291] Yves de Belleme (son of Yves II de Creil).
33. [TALY301] Renard de Chateau-Gontier (son of Yves de Belleme) married 1. Elizabeth; then 2. Beatrix du Perche.
32. [TALY312] Gervaise de Chateau-Gontier (daughter of Renard & Beatrix) married [MAYE349] Count Geoffroy II (see MAYENNE).
34. [TALV292] Hildeburge (daughter of Ives II de Creil) married (c.1006) [MAI1301] Seigneur Haimon d'Argentre (born c.975, see MAINE SEIGNEURS).
37. [TALV293] Godehildis (daughter of Ives II) married 1. Albert I de la Ferté-en-Beauce; then 2. [BEAU341] Vicomte Raoul du Maine (see BEAUMONT-AU-MAINE).

36. [TALV291] William (born c.940, son of Ives II), Sire d'Alencon, Seigneur de Saonnois, married (c.960) Dame Mathilde de Conde-sur-Noireau in Calvados. He died after 1027.

33. [DAMF321] Warin de Domfront (son of William), Count of Alencon (-1026). He was murdered (strangled) 1026.
32. [DAMF332] Adelise d'Alencon (born 1005, daughter of Warin) married [c.1025] [PERC331] Count Rotrou I of Mortagne (see CHATEAUDUN).

as an aside, some sources exclude the following intermediate generation:

35. [TALV301] William Talvas de Belleme (born c.964, son of William), Count of Belleme & Alencon, married (c.985) Matilda de Ganelon (born c.964, possibly son of Arnulf). He died 997.

34. [TALV312] William II Talvas (born at Belleme, c.995, son of [TALV291] William), Vicomte du Hiesmos, Seigneur de Belleme & Alencon, Count of Alencon (1026-30, succeeding Warin), a cruel and barbarous man, married 1. (c.1020) [BEAU372] Haberga de Beaumont (born c.995, widow of Sire Tesseli de Montrevrault; and daughter of Seigneur Raoul I, see BEAUMONT-AU-MAINE), strangled on her way to church; then 2. Hadeburg de Beaumont (widow of Seigneur Tescelin de Montevrault, and eldest daughter of Vicomte Raoul I du Maine). William died c.1048.

33. [TALV322] Mabel (born at Alencon, c.1026, daughter of William & Hildeburge), Comtesse d’Alencon & Belleme, married (c.1052-54) [TMON331] Earl Roger (see SHREWSBURY (MONTGOMERY) EARLDOM).