Most recently, DNA tests and research have proven the linkage between the MacShanes and the O'Neills of Tyrone. In a study begun in 2002, Patrick Guinness funded Trinity College, Dublin to conduct a DNA study on the O'Neil's of Ulster, to include the MacShane family. The results were published by Ed O'Neill and the late John McLaughlin that showed the McShanes were 100% match of a unique DNA sequence that is specific to the Chiefly line of the Tyrone O'Neills. It is estimated by Trinity College that the specific gene 'break' with the rest of the O'Neills of Ulster was either Aedh Macaomh Toinleasg O'Neill, King of Cenel Eoghain from 1176 to 1177, or his father, Muircheartach Muighe Line O'Neill. Caribbean O'Neills Many O'Neills moved to the Caribbean, especially from the lines of the Counts of Tyrone of Hugh MacFerdorcha O'Neill. Their close connection to the Spanish government after the final fall of the O'Neills in 1690 provided the opportunity for new territory. Family documents that the O'Neill's had elements land on the Islands and were associated with the families of Rocco, Eammon, Constatino or Conn Eoghan, Edmundo, and Gill – all men who served in the Ultonia and Hibernia regiments for the Crown of Spain. Recent findings show that other O'Neill's settled in Puerto Rico in the 18th century. The earliest record, based on documents from the Spanish royal courts, show that Don Juan O'Neill arrived in Puerto Rico in the 1710s. Two O'Neill officers served in the Spanish Army forces of Bernardo de Galvez fighting the English in Florida and Alabama during the American Revolution. Tulio and Enrique O'Neill y O'Kelly, of the O'Neills of the Fews, became residents of St. Croix in the 1770s in the footsteps of a deceased uncle. Tulio's sons, Arturo and Tulio O'Neill y O'Keefe, were granted land in Puerto Rico in 1804. Arturo moved his family there in March 1810 and his descendants continue to reside there today as well as in Spain and the USA. Most O'Neill families of Puerto Rico have for many generations resided in the districts of Hato Nuevo, Mamey, and Sonadora of the city of Guaynabo on the northern coast of the island of Puerto Rico. Other O'Neill families have settled in the cities of Río Piedras and Caguas. Many other O'Neill families that moved from Barbados settled on the Island of Vieques. The O'Neills have been