Hervé II de Léon

Harvey II (, , or ; c. 1110 – 1168), also known as Hervey Brito or Hervey le Breton, was a Breton nobleman. He was the Earl of Wiltshire in England between 1140 and 1141. About 1157, he succeeded his father, Guihomar III, as the Viscount of Léon in Brittany.

Earl of Wiltshire

According to William of Malmesbury, Harvey declined an invitation from King Henry I of England (1100–35) to attend his court. However, he went to England to assist King Stephen in the war against Matilda. The Gesta Stephani describes Harvey as "a man of distinction and soldierly qualities". He was careful to state that he was going of his own free will and not out of compulsion or allegiance owed to the English king. Around 1139, in reward for his service to Stephen, who was at the time secure on his throne, Harvey received the hand in marriage of the king's illegitimate daughter Sybilla. He also received the Earldom of Wiltshire and the honour of Eye in Suffolk, which had been Stephen's before his accession.

In 1140, Harvey somehow negotiated the surrender of Devizes Castle, preventing it from falling into the hands of Robert, Earl of Gloucester. In response, the king formally granted him Devizes so that he could better defend Wiltshire. From there, according to the Gesta Stephani, he fought "obstinate and unceasing warfare with the king's assailants." The following year, however, he was embarrassed when Devizes was overtaken by a mob of countrymen (comprovinciales) and he abandoned it to Matilda's men. As a result, his earldom was confiscated and he left England in disgrace. Matilda then appointed Patrick of Salisbury her earl in Wiltshire.

Harvey's wife probably followed him to Brittany. Likely because of her he held animosity towards the Plantagenet dynasty that succeeded Stephen on the throne.

Viscount of Léon About 1157, Harvey succeeded his father in Léon. He expanded his power and began styling himself "Count of Léon" (comes Leoniæ), but he struggled to maintain his de facto independence from his immediate overlord, the Duke of Brittany, and from the influence of the England.

In 1167 Harvey raised the standard of revolt with Eudo II, viscount of Porhoët, and Geoffrey IV, viscount of Thouars, with tacit support from King Louis VII of France. After an agreement with Louis, King Henry II of England led a campaign against Léon in August 1167. Harvey's son Guihomar was defeated and captured, and his major castles razed. Guihomar submitted and offered hostages. Hamo, Bishop of Léon, murdered by his brother Guihomar in 1171

A mention dated 1169 indicates that Harvey had an illegitimate son: Harvey, who was the father of Gradlon, Budic and Guigon