Minting at Nevers dates from the Carolingian era. Carolingians with coinage from Nevers are:

Pepin le Bref (752-768)        Charles the Simple (898-929)

Lothar I (817-855)             Raoul (923-936)

Charles t.Bald/Charles t. Fat  Louis IV (936-954)
(840-877)

From the middle of the 9th century to William IV (1161) coins from Nevers are not attributed to specific rulers. They have the same general characterisitcs with an obverse that is some version of  "LVDOVICVS REX" and a reverse along the lines "NEVERNAIS CIVT"

Otto William (987-992)           Renauld II (1079-1095)

Landri (992-1028)              William II (1095-1147)

Renaud (1028-1040)             William III (1147-1161)

William I (1040-1079)          Anonymous counts (11 - 12th C)

From here on, counts have coinage in their own names, "COMES etc."

William IV (1161-1168)         Mahaut II and Eudes de Bourgogne (1257-1267)

Gui (1168-1175)                Jean Tristan (1265-1270)

William V (1175-1181)          Robert de Dampierre (1271-1296)

Pierre de Courtenay (1184-99)  Louis de Flanders (1296-1321)

Herve de Donzy (1199-1223)     Louis II de Crecy (1321-1346) ** no coinage from
                               Nevers (died at Crecy fighting for the English)

Gui de Forez (1226-1241)       Louis III de Male (1346-1384)** no coinage from
                               Nevers

After Nevers became a royal mint, it had both French and English coinage.

Charles VI  (1421-1422)        Henry VI of England (1422 - 1435)

Charles VII (1436)

Sources:

Poey d'Avant, Monnaies Feodales de France

Duplessy, Les Monnaies Francaises de Hugh Capet a Louis XVI