Which conquistador traveled to Saint Augustine and when?
Juan Ponce de Léon traveled to the area around St Augustine and claimed it for Spain in 1513. Tristán de Luna y Arellano tried to settle a colony there around 1559. Pedro Menéndez de Avilés finally founded St Augustine in 1565.
Is Saint Augustine grass named after Saint Augustine of Hippo or the city of Saint Augustine Florida?
Augustine is a 'precongregational' saint. He was declared a saint by the early Church before the canonization process was fully instituted in the 12th century. Back then, any bishop could declare a saint. Today only a pope can do that and only after years of investigation by the Sacred Congregation for the causes of Saints.