Rosa Maria de Fonseca parents

Hello forum,

Rosa Maria de Fonseca married Juan Garcia de Miranda (Felipe Vasquez de Lara's grandson) in Santa Maria de los Lagos on June 30 1693. She died on June 02 1702 in the birth of their son Felipe.

Juan tried to get married again on 1710. In the information he presented he stated he was the widow of Rosa Maria de "Ysas" (Isassi).

There was a married couple: Domingo de Fonseca and Felipa de Isassi whose children were born in the same time frame Rosa Maria was born. One of them: Blas, married Leonor Gutierrez de Hermosillo in Tepatitlan on June 02 1704. Leonor was granddaughter of Pedro Gutierrez de Hermosillo, natural son of Juan Gonzalez de Hermosillo.

The clues point Rosa Maria was the daughter of Domingo and Felipa. If so, the same Fonseca's were nearly related to Garcia de Miranda and Gutierrez de Hermosillo lineages.

Does anybody has information confirming it, or information about who her parents were?