Arnao Esterlin (1593) was a Flemish conquistador in service of the Spanish crown. He took part in the appointment of Captain Domingo MartÃÂnez de Irala as lieutenant governor of Asunción.
Esterlin was born in Flanders, the son of Cristóbal Esterlin (Osterling) and Ana Bersthin, natives of Germany. He arrival at RÃÂo de la Plata as a gunner in the expedition of Pedro de Mendoza.
Arnao Esterlin had three natural children with a Guaranàwoman, native of Asunción. His son Rodrigo de EsterlÃÂn, was married to Juana Solorzano, the daughter of Zoilo de Solorzano, a conqueror born in Biscay.