Simplify the following text for a Grade 5 native English-speaking person.
Original: Dominic was born in Caleruega , halfway between Osma and Aranda de Duero in Old Castile , Spain .
Simplified: He was born in Caleruega , half-way between Osma and Aranda in Old Castile , Spain . He is sometimes called Dominic of Osma or Dominic de GuzmÃ n.