help- TENASCO (TENAXCO)

Hi;

I hope somebody can help me with this. In one of my lines from Jerez-tepetongo (Salinas line). I have a document (Marriage 1737) that saids that the family was from TENASCO. I assumed that was in Jalisco. I found a dam with the name Tenaxco very close to colotlan-Sta Maria de los Angeles. But now there isn't a town with that name. Can anyone tell me if Tenasco was the old name for the region? Where should I look for the records? Maybe Colotlan?, Maybe Sta Maria de los Angeles? Has anyone seen the name tenasco (tenaxco)?

Thank you

susana leniski