Statistics for occurrence #1 of “de Ulloa” in entry hawkins-sir-john of Harper's Encyclopedia of United States History:

...fairly detailed account of it in his narrative. He made a third voyage in 1568, and in spite of the King of Spain's prohibition, sold his cargoes of slaves to advantage. In the port of San Juan de Ulloa he met a Spanish fleet much stronger than his own. He made a solemn compact of mutual forbearance with the Spanish commander, which he treacherously broke, and in the ensuing conflict Hawkins was...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
De Ulloa 30 16 0 0 0 user votes
Antonio De Ulloa 26 10 0 0 0 user votes
Francisco De Ulloa 10 10 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.