need help with one word in doc from 1700s

Hi Everyone

There is one word I cannot read in a baptism entry:

https://familysearch.org/ark:/61903/3:1:9392-K79Y-YV?i=398&wc=3JD4-829%3A171936601%2C171934502%2C171963901&cc=1874591

In the entry for Joseph Miguel, mulato esclabo:

What is the first word in line 8, just before “de Petra…”?

I need to know for sure if it identifies Petra as the mother of Jose Miguel. If so, I can try to follow her line.

Very exciting! first historical documentation of African genes!

Regards
Denise