Census Records of Bexar Co.
Census information obviously contains spellings of surnames that are not as we know them to be today. As we do our genealogy research, one must remember the education level of the person who gathered the information, the person who gave the information and the person who rewrote the census taker's information. There were also other factors to consider of these individuals. One of those factors is that they may not have been familiar with the ethnic group of which they were interviewing. The differences in languages plays a large role in the different spellings you will see.
For the best results in your search, please check all possible spellings (including phonetic spellings) of the surnames you are interested in.