Carolus Mulerius (21 February 1601, Harlingen – 13 August 1638, Groningen)[1] was a Dutch Hispanist and grammarian.
He was the son of Christina Maria Six (1566-1645) and Nicolaus Mulerius (1564-1630), who is most famous as an astronomer, but at the time was physician of the city of Harlingen.
His elder brother Petrus Mulerius [pt] (1599-1647) became Professor of Physics and Botany at the same university.
[1] He wrote Linguae Hispanicae Compendiosa Institutio (1630),[3] Linguae Italicae Compendiosa Institutio (1631), Linguae Gallicae Compendiosa Institutio (1634), and Een korte ende seer dienstighe onderwijsinge Vande Spaensche Tale.
The last work, published posthumously in 1648, was the first grammar of Spanish written in Dutch.