1553 Mexico City baptism record; need help re: Montemayor reference

Hello everyone --

I came across an interesting 1553 baptism record in Mexico City. Among the witnesses listed are Cristobal Onate, Hernan Peres de Bocanegra and Antonio de la Cadena. However there's also a name listed, where I can't read the first name but the last name is "de Montemayor"

Can anyone tell what the first name is for the Montemayor person? I'm working on a side project looking at the Mexico City connections for the founding families of Monterrey and Saltillo in case anyone is interested. See http://texmexroots.blogspot.com/p/mexico-city-monterrey-founder.html.

The record I'm talking about can be found at the Family history site, or at my website where I also posted it. If you're looking at the familyhistory website, here's the info you need: Asunción Sagrario Metropolitano (Centro) -- Bautismos de Españoles 1536-1589 -- p185 of 1003 (baptism of Jeronima, hija de Martin de Campos y su mujer Leonor)

Here's the link: https://www.familysearch.org/search/image/index#uri=https%3A%2F%2Fapi.familysearch.org%2Frecords%2Fwaypoint%2F11154573

Thanks for any help!

Chris Pineda