John I degli Aleramici, marquess of Montferrat

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John I degli Aleramici, marquess of Montferrat

English (default): John I, marquess of Montferrat, Italian: Giovanni I "il Giusto" degli Aleramici, marchese del Monferrato, French: Jean I, marquess of Montferrat
Death: January 1305 (29-30)
Place of Burial: Trino, Province of Vercelli, Piedmont, Italy
Immediate Family:

Son of William VII, marquess of Montferrat and Beatriz de Castilla, marchesa del Monferrato
Husband of Margaret of Savoy
Fiancé of Blanca de Nápoles, reina consorte de Aragón and Marie de Clermont
Brother of Son; Eirene of Montferrat and Alessina de Montferrat
Half brother of Margherita del Monferrato, signora di Valencia

Occupation: Marquess of Montferrat
Managed by: Private User
Last Updated:

About John I degli Aleramici, marquess of Montferrat


John I (circa 1275–1305) was the Margrave of Montferrat, last the Aleramici dynasty, from 1292 to his death. John was the only son of William VII of Montferrat and his second wife Beatrice, daughter of Alfonso X of Castile. In his youth, John was put under the tutelage of Thomas I of Saluzzo during the period of William's imprisonment in Alessandria. William died in prison and the peace was upset by Piedmontese rebellions. Charles II of Naples interevened for the defence of John's realm, hoping in the end to install him as his vassal in Piedmont.

With Charles and Thomas, who renewed the investiture of Dogliani, John fought against Alessandria and Asti to recuperate territories lost by his father. He came in conflict with the House of Savoy and Milan. Philip of Savoy possessed Collegno, Grugliasco, Turin, and Pianezza which had been lost by William VII. The league John formed against Matteo Visconti succeeded in chasing him from the city in 1302 and obtaining the submission of Asti in 1303. In January 1305, he fell ill while planning a campaign against Savoy. A few days after dictating his testament, which entrusted his lands to the commune of Pavia, he died and was buried with his forefathers in the abbey of Santa Maria di Lucedio.


K1. Jean I "il Giusto", Marchese di Montferrato and Signore d'Ivrea (1292-1305), Signore di Novara (1299-1301), Signore di Asti (1303-04), *1277, +9.1.1305;

m.23.3.1296 Margaret of Savoy (+6.7.1339)


e) GIOVANNI (Milan 1278-[9] Mar 1305). His parentage is confirmed by the charter dated 14 Dec 1306 under which "dominus Theodorus…domini Grecorum filius…marchio Montisferati" confirmed the rights of Santa Maria di Vezzolano granted by "quondam dominos Johannem et Guillermum bone memorie marchioness Montisferati avunculum et avum dicti domini marchionis"[258]. He succeeded in 1290 as GIOVANNI I Marchese di Monferrato, under the guardianship of Charles II King of Sicily. However, Matteo Visconti Lord of Milan occupied Monferrato, imposed himself by force as Captain-General in the Marquisate and as guardian of Marchese Giovanni. Marchese Giovanni succeeded in wresting control from the occupiers in 1303[259]. The testament of "Johannes…marchio Montisferrati", dated 18 Jan 1305, appoints as his heirs (in case he had no issue by "Margarita de Sabaudia uxore ipsius") "filios Alaxine sororis sue condam et uxoris Puncelli de filiis Ursi", and failing them "filium Margarite sororis sue condam uxoris Johannis infantis de Yspania de Castella", and failing him "Maynfredum marchionum Saluciarum"[260]. The Chronicon Astense records the death in 1305 of "Johannes Marchio Montisferrati…sine filiis"[261]. [262]

Betrothed ([1290]%29 to BLANCHE of Sicily, daughter of CHARLES II King of Sicily [Anjou-Capet] & his wife Maria of Hungary ([1280]-Barcelona 14 Oct 1310, bur Santa Croce), who later married Jaime II King of Aragon. [263]

Betrothed (1295) to MARIE de Clermont, daughter of ROBERT de France Comte de Clermont Sire de Bourbon & his wife Béatrix dame de Bourbon ([1284/85]-Paris 17 Mar 1372, bur Poissy).

m (23 Mar 1296) MARGUERITE de Savoie, daughter of AMEDEE V Comte de Savoie & his first wife Sibylle de Baugé (-1339). "Margarita di Savoia" made a donation to "Conte Amedeo suo Padre" of a sum on money bequeathed to her under the last testament of "Dama Sibilla sua Madre" dated 6 Jan 1296[264], presumably as part of the arrangements for her forthcoming marriage. The contract of marriage between "Gioanni Marchese di Monferrato" and "Margarita di Savoia figlia del Conte Amedeo V di Savoia" is dated 23 Mar 1296[265]. The Chronicon Astense records the marriage in 1296 of "Johannes…Marchio Montisferrati" and "Amadeum Sabaudiæ comitem…Margaritam eius filiam" who had previously been betrothed to "Johanni filio Humberti Delfini"[266]. A contract dated 14 Mar 1305 between "Marchese Manfredo di Saluzzo" as Governor of the Marquisate of Monferrato and "Margarita di Savoia figlia del Conte Amedeo Vedova del suddetto Marchese" confirmed her possession of the castles of Lanzo, Ciriè and Caselle as part of her dowry[267].

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John I degli Aleramici, marquess of Montferrat's Timeline

January 1305
Age 30
Abbazia di Santa Maria di Lucedio, Trino, Province of Vercelli, Piedmont, Italy