Baptism Abbreviations - Purisima del Rincon

While we've made good progress in other lines, we continue to get stuck with the line through Purisima del Rincon. Unfortunately, they didn't include paternal/maternal abuleos in the baptism records. There are lots of abbreviations in Atanasio's baptism record that we're curious about, particularly if the "YeO" is referencing a location or perhaps an indicator that he's "Indio". It seems to be used on some other records in the same volume. We have found 2 siblings, and one has the same abbreviation on his record. Any insight is appreciated.

https://familysearch.org/pal:/MM9.3.1/TH-1942-20545-11939-84?cc=1860831&wc=MC4M-B68:167586501,167586502,167859403

(left, 3rd from bottom - Atanasio)