dona
1 of 2noun (1)
do·na ˈdō-nə 
: a Portuguese or Brazilian woman of rank —used as a title prefixed to the Christian name
doña
2 of 2noun (2)
do·ña ˈdō-nyə
: a Spanish woman of rank —used as a title prefixed to the Christian name
Word History
Etymology
Noun (1)
Portuguese, from Latin domina lady — more at dame
Noun (2)
Spanish, from Latin domina
First Known Use
Noun (1)
circa 1897, in the meaning defined above
Noun (2)
1606, in the meaning defined above