Guillermo “Willie” De La Rosa, 79, of San Marcos, TX passed away on Tuesday, April 30, 2019 at his home in San Marcos, TX. A mass of Christian burial was celebrated on Monday, May 6th at St. John the Evangelist Catholic Church in San Marcos, TX and interment followed at San Marcos Cemetery. For more information, please visit www.thomasonfuneralhome.com.