Donal Cam O'Sullivan Beare

Donal Cam O'Sullivan Beare, Count of Berehaven (Irish: Domhnall Cam Ó Súileabháin Bhéara; 1560 – 6 July [N.S. 16 July] 1618) was an Irish nobleman and soldier. He was the last Gaelic chief of the O'Sullivan clan prior to the completion of the Tudor conquest of Ireland.

O'Sullivan Beare immigrated to Spain after the Irish confederacy's defeat in the Nine Years' War, and was granted the titled Count of Berehaven in the Spanish nobility. In 1618, he was fatally stabbed by Anglo-Irish merchant John Bath during a quarrel in Madrid.