Guillermo “Willie” De La Rosa, 79, of San Marcos, TX passed away on Tuesday, April 30, 2019 at his home. Visitation will be from 4:00 to 9:00 pm, Monday, May 6, 2019 at the Thomason Funeral Home in San Marcos, TX. Recitation of the holy Rosary will begin at 7:00 pm. A mass of Christian burial will be celebrated at 11:00 am on Tuesday, May 7, 2019 at St. John the Evangelist Catholic Church in San Marcos and interment will follow at the San Marcos Cemetery. For more information, visit Thomason Funeral Home's website.