Ildefonso Fraga Ozuna is better known as Sunny Ozuna of Sunny and the Sunglows fame. Their big hit was Talk to Me that made the #11 spot on the Billboard Hot 100 in October, 1963. It is a cover of Little Willie John's effort of the same name from 1958.
The Sunglows became the Sunliners and came out with Just a Dream.
Baldemar Garza Huerta, also a Tejano, is better known as Freddy Fender.