Sorry for being so slow in replying to your message.I am just returning back home from a trip to New York City.
All of my husband's family is also from Rincon.
Since you say all of your family is from Rincon it is possible that Acevedo is not the only name where there can be a possible link.
I will give you what I have below.
1. Jaime Collazo - my husband 2. Jaime Collazo Muniz and Carmen Ruiz Sanchez - his parents 3. Candido Collazo Cardona and Matias Muniz Acevedo - his paternal grandparents. 4. Juan Ramon Ruiz Sanchez and Silvana Sanchez Caro - his maternal grandmother. 5. Rufino Collazo (?) and Gregoria Cardona (?) and Antonio Muniz (?) and Antonia Acevedo (?) - his paternal great grandparents. 6. Manuel Ruiz (?) and Juanita Sanchez (?) and Sixto Sanchez (?) and Dominga Caro (?) - his maternal great grandparents.
Please let me know if any of these names are familiar to you.