Osanyin's distinctive body, one leg, one arm, one eye, belongs to a recognizable pattern comparative mythologists have noted across a number of unrelated traditions: a deity or supernatural specialist whose physical difference from an ordinary human form marks out, rather than diminishes, an unusual and dangerous kind of power, typically knowledge or skill other deities and mortals alike must depend on. Scholars of comparative religion point to structurally similar figures elsewhere, the one-eyed Norse Odin, who trades an eye for wisdom at Mimir's well, and the lame smith-god Hephaestus of Greek myth, whose crafting skill is inseparable from his physical difference, as examples of a wider, independently occurring association between bodily asymmetry and privileged access to specialized, often dangerous knowledge, an idea some anthropologists connect to the broader cross-cultural pattern in which shamans and ritual specialists are frequently marked, by illness, injury or unusual birth, as set apart from ordinary people before they can serve as intermediaries to hidden knowledge.
Osanyin's own case has a specific explanation offered within Yoruba tradition itself, connecting his single leg to the single trunk from which all trees and their leaves grow, a piece of native symbolic logic that need not depend on any borrowed or coincidental parallel to work on its own terms. The comparative pattern is worth noting nonetheless because it shows Osanyin's uncanny form is not an isolated invention but one local expression of a much wider human habit of imagining the deepest, most necessary knowledge as guarded by a figure who does not look like everyone else, a habit found in societies with no historical contact with one another.