Isidial

Isidial is a term that can refer to a few different things, primarily in the context of family and inheritance, or in a more specific, less common, and archaic sense related to religious figures.

In genealogical and legal contexts, "isidial" is an archaic term for a collateral relation, meaning a relation who is not a direct ancestor or descendant. This would include siblings, cousins, aunts, uncles, and their descendants. It emphasizes a relationship through a common ancestor but not in a direct line. This usage is largely obsolete in modern legal and familial discussions, having been replaced by more precise terminology.

Historically, and in a much rarer, specialized sense, "isidial" could sometimes be associated with individuals named Isidore, particularly religious figures like Saint Isidore of Seville. However, this is not a standard or widely recognized term. The primary understanding of "isidial" relates to the concept of collateral kinship, however uncommon its present-day usage.