"Biographical Expert Report on the politician Manuel Santiago Pantín, known in Puerto Rico as Santiago Iglesias Pantín.” 2025 [Spanish title: "Informe Pericial Biográfico sobre El Polítco Manuel Santiago Pantín, Conocido en Puerto Rico Bajo el Nombre de Santiago Iglesias  Pantín."] 

This fascinating scholarly report (in Spanish) was authored by Spanish scholar Eliseo Fernández Fernández, who gave explicit permission for us to share it on our website. It reveals and explores the history of SIP using both his given name, Manuel Santiago Pantín, and Santiago Iglesias Pantín, the name he adopted in Puerto Rico. It includes a 15-page narrative and 48 pages of extensive documentation and photographs. 

We appreciate Haydee Iglesias Belendez, Ibsen Morales, and Joaquin and Didi Iglesias for funding the study and sharing it with IFF. Thank you again to the author, Eliseo Fernández Fernández — the Iglesias family is very grateful for your effort and care.