Miguel is Alejandra's father, and Alejandra is the cousin of Isabel. This means that Miguel is either the brother or brother-in-law of one of Isabel's parents. Since Isabel is the granddaughter of Javier, Miguel is the son or son-in-law of Javier. The familial hierarchy would therefore place Javier, as the grandfather, on a higher generational level than Miguel.

Since Javier is from an older generation than Miguel, he would typically be considered to have seniority-based familial authority over Miguel, as Miguel is either Javier's son or son-in-law. In most familial structures, the older generation (in this case, the grandfather, Javier) would hold a seniority position over the younger generation (in this case, the father, Miguel). Thus, Javier would have the seniority-based familial authority over Miguel, not the other way around.
Javier is the grandfather of Isabel. Isabel's cousin, Alejandra, often babysits for Isabel's younger brother, Carlos. Miguel is Alejandra's father. How is Miguel related to Javier, and does Miguel have a seniority-based familial authority over Javier?

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