Santo Domingo | Pedro Martínez | Universidad Autónoma de Santo Domingo | Martinez, California | Bob Martinez | Tino Martinez | Roberto Martínez | Odaline de la Martinez | Eugene Domingo | Domingo Faustino Sarmiento | Tomás Eloy Martínez | Susana Martinez | Santo Domingo (Ecuador) | Domingo | Dennis Martínez | Carlos Martínez de Irujo, 1st Marquis of Casa Irujo | Antonio María Martínez | Santo Domingo de Silos | Santo Domingo de los Olleros District | Santo Domingo, Chile | Santiago Martínez Delgado | Rafael Arévalo Martínez | Pedro Martinez | Oscar Martinez | Neco Martínez | Martínez de la Torre | Martinez | María del Carmen Martínez-Bordiú y Franco | Leo Martinez | José María Caro Martínez |
He investigated about the Ypacaraí Lake, its legends and history; about Domingo Martínez de Irala and about little known facts of the Jesuit Missions in the Paraguay.
He also accompanied Juan de Ayolas on his first trip in quest of provisions, and afterward went with Ayolas in his expedition up Paraguay River, and was one of the soldiers that were left with Domingo Irala in charge of the vessels in the port of Candelaria.