Firstborn; the one born first in order among siblings, especially sons, and thus holding a position of particular status or precedence within the family or clan structure. In extended uses, can denote a preeminent individual or group, or the earliest or most prominent instance of a class. The term frequently implies legal and social privileges associated with birth order, such as inheritance rights and special responsibilities.

{# === Technical Reconstruction (Group B) === Only the WorkedDerivation chain renders here now. Legacy fields (proto_sound_correspondences, proto_reconstruction, proto_root_clusters) came from earlier auto-generated work that didn't reflect the current branch-direct methodology — kept in DB but not surfaced in UI. #}