Thorvald Eiriksson was the brother of an explorer who is believed to be the first known European to discover what continent?
North America
Title: Thorvald Eiriksson
Passage: Thorvald Eiriksson (Old Norse: "Þōrvaldr Eirikssonr" ; Icelandic: "Þorvaldur Eiríksson" ) was the son of Erik the Red and brother of Leif Erikson.
Title: Leif Erikson
Passage: Leif Erikson or Leif Ericson (Old Norse: "Leifr Eiríksson" ; Icelandic: "Leifur Eiríksson"; Norwegian: "Leiv Eiriksson" 970 – c. 1020) was a Norse explorer from Iceland.  He was the first known European to have discovered continental North America (excluding Greenland), before Christopher Columbus (or possibly Saint Brendan).  According to the Sagas of Icelanders, he established a Norse settlement at Vinland, tentatively identified with the Norse L'Anse aux Meadows on the northern tip of Newfoundland in modern-day Canada.  Later archaeological evidence suggests that Vinland may have been the areas around the Gulf of St. Lawrence and that the L'Anse aux Meadows site was a ship repair station.
Title: Juan Ponce de León
Passage: Juan Ponce de León (] ; 1474 – July 1521) was a Spanish explorer and "conquistador".  He became the first Governor of Puerto Rico by appointment of the Spanish crown.  He led the first known European expedition to "La Florida", which he named during his first voyage to the area in 1513.  Though in popular culture, he was supposedly searching for the Fountain of Youth, there is no contemporary evidence to support the story, which is likely a myth.
Leif Erikson Thorvald Eiriksson