Hurley Family Tree

Used for comparative purposes, not as direct evidence about Urthuile himself. Establishes the general pattern for how Dalcassian hereditary surnames formed: named ancestors living in the mid-to-late 10th century typically had fixed Ó/Mac surnames crystallize among their grandsons or great-grandsons in the 11th century, well attested in contemporary annals rather than reconstructed. Cited to show that Urthuile's estimated lifetime (c. 940 AD, derived independently by counting back from Domnall, fl. 1660–70) fits the expected timing for a Dalcassian eponym whose descendants' surname would fix in the following generation or two — and, by the same logic, that a much later "Urthaile" appearing many generations below Heber in O'Hart's own pedigree list would already postdate the O'Hurly surname's formation by centuries, making him chronologically implausible as the surname's true eponym.