What is "canavan"

Canavan is a surname of Irish with two possible translations, both Anglicized:

1. "White Head" from O'Ceanndubhain Sept who were hereditary physicians to the O'Flahertys of Connemara. Whitehead and Whitelock are sometimes used in Galway. Spelling variations include: Canovan, O'Canavan, Canaman, Kinevan, Kinavan, Kanavan, O'Kennevain.

2. "Black Head" from uiCeanndubhain - descendant of the dark haired one. a byname meaning ‘little black-headed one’, from ceann ‘head’ + dubh ‘black’ + the diminutive suffix -án.