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"...Their son Don Tulio O'Neill y O'Kelly married Catherine O'Keffe y Whalen and became the parents of Arturo O'Neill y O'Keffe and Tulio O'Neill y O'Keffe. Don Tulio O'Neill O'Kelly and his brother Don Enrique O'Neill O'Kelly were granted
linceses by the Spanish crown to create sugar plantations on the island of Puerto Rico in 1784 and became the first of the O'Neill's of the Fews to settle in Puerto Rico.
Don Tulio was born in St. Croix, Danish West Indies in 1784 he became a General and won many distinctions during the Peninsular War fighting the French Army. He married Manuela de Castilla the daughter of a Spanish noble family. They became parents of Don Juan Antonio Luis O'Neill born in 1812 who married Dona Luisa de Salamanca. He latter inherited his mother's titles in 1847: the Marques de la Granja, the Marques de Caltojar, the Count of Benajiar and the Marques de Valdeosera. He died in 1877. From then on the family is known as the O'Neill of the Fews of Seville.
Don Arturo O'Neill y O'Keffe was born in 1783 on St. Croix, Danish West Indies. He became Lieutenant Colonel on the 17th of August, 1828. in Bayamón, Puerto Rico. A Knight of the Royal Order of King Carlos III of Spain and 2nd Marques del Norte. He died in Sept 7, 1832 and is buried in the Roman Catholic Church of Frederiksted, Saint Croix (Santa Cruz), Danish West Indies. He was married to Joanna Chabert Heyliger on April 19, 1802 in St. Croix.
The present Prince of the Fews is descended from Don Tulio O'Neill and presently lives in Spain with his family. The O'Neill family council recognizes him as the hereditary chief of the Fews O'Neills."