Figlioccia in the feminine and figlioccio in the masculine are Italian equivalents of the English word "godchild."
Specifically, the word functions as a noun in its feminine and masculine singular forms. The word figlioccia means "female godchild, goddaughter." The word figlioccio means "male godchild, godson."
The pronunciation will be "fee-LYOT-tcha" in the feminine and "fee-LYOT-tcho" in the masculine.