Pam, Acording http://188.8.131.52/search?q=cache:H1oWNItowbMJ:www.boxrec.com/media/index.php/Luis_Angel_Firpo+%22EMIL+FIRPO%22&cd=2&hl=es&ct=clnk&gl=arhttp://184.108.40.206/search?q=cache:H1oWNItowbMJ:www.boxrec.com/media/index.php/Luis_Angel_Firpo+%22EMIL+FIRPO%22&cd=2&hl=es&ct=clnk&gl=ar : “Incidentally, Firpo had a cousin (some newspaper reports say brother) named Emil Firpo, who became a popular professional wrestler in the United States. (See a photo of him in the 4 April 1930 Daily Olympian (Olympia, WA, USA).) According to the 17 July 1928 Wenatchee Daily World (Wenatchee, WA, USA), Emil, aged 29 then, was Luis's brother. At this time Emil Firpo was living in Seattle, WA, and wrestling as "Carl Delvos." He had come to the United States seven years earlier, enlisted in the 47th Infantry in 1923 at New York City, and mustered out of the military at nearby Camp Lewis, WA, after 18 months of service. He had engaged in 70 wrestling matches, and lost only four.
Acording to http://es.wikipedia.org/wiki/Luis_%C3%81ngel_Firpohttp://es.wikipedia.org/wiki/Luis_%C3%81ngel_FirpoAgostino Firpo arrived to Junin (in the province of Buenos Aires) in 1887 from Italy. The next year, he got married to Angela Larroza, who was spanish.The couple had four children: Serafina, Luis Ángel (the boxer), Alfredo and Juan. On this last child`s birth (1902) the mother passed away.
Therefore, he is not the boxer’s brother, but he might be his cousin. And as one of his cousins was the famous musician Roberto Firpo (1884-1969), maybe his son (also a famous musician called Roberto aswell) might be able to help you. You can contact him through the website of his radio show: http://www.am840generalbelgrano.com/programas/con_alma_bohemio.htmhttp://www.am840generalbelgrano.com/programas/con_alma_bohemio.htm