[1] He was also one of the four "chuchkajawib" (lineage leaders) of Momostenango.
[2] After his death, his son Angél became chuchkajaw of the Santa Isabel lineage.
Being a native speaker of the Kʼicheʼ language and a practitioner of traditional Maya calendric divination, he served as a consultant for several anthropological studies.
He assisted Dennis Tedlock in elaborating his award-winning translation of the ancient Kʼicheʼ document Popol Vuh.
[3] Dennis Tedlock has described the translation process as "three-way dialogue among Andres Xiloj, the Popol Vuh text, and myself.