Trying to find family of Antonio and Isabel Loperena Estrada who were born in Puerto Rico. Trying to find Joseph Estrada, Manuel Rivera and Oscar ?..who are brothers born with three different fathers and whose mother was Isabel Loperena's sister. Joseph is the son of that sister and Antonio Estradas brother. Manuel last seen in New York City as a car mechanic or something. Joseph, last known married to an AMerican woman..and moving back to Puerto Rico. My 82 year mom in law..is searching for Joseph who would be about her age right now if he is still alive.