William Henry Egle’s seminal work, “Names of Foreigners Who Took the Oath of Allegiance to the Province and State of Pennsylvania, 1727-1775, with the Foreign Arrivals, 1786-1808” published in 1892, stands as a comprehensive record of immigrants who pledged their loyalty to both the British Crown and later to the State of Pennsylvania. The document lists names and details of individuals who, upon their arrival in America, were mandated to declare their allegiance—a legal requirement aimed at reinforcing loyalty to the provincial and state governance. The text not only catalogs these oaths but also provides vital genealogical data, including ship names, points of departure, and the dates of oath-taking. Despite the original documents being significantly damaged over time, this publication, authorized by the state, offers a meticulously collated and indexed reference that is indispensable for researchers and descendants seeking connections to their early Pennsylvanian ancestors.