[Келебрин]

Согласно развитой мифологии, сами размножиться они не могли: "...if a "spirit" (that is, one of those not embodied by creation) uses a hröa for the furtherance of its personal purposes, or (still more) for the enjoyment of bodily faculties, it finds it increasingly difficult to operate without the hröa. The things that are most binding are those that in the Incarnate have to do with the life of the hröa itself, its sustenance and its propagation.... Most binding is begetting or conceiving.
"We do not know the axani (laws, rules, as primarily proceeding from Eru) that were laid down upon the Valar with particular reference to their state, but it seems clear that there was no axan against these things. Nonetheless it appears to be an axan, or maybe necessary consequence, that if they are done, then the spirit must dwell in the body that it used, and be under the same necessities as the Incarnate. The only case that is known in the histories of the Eldar is that of Melian who became the spouse of King Elu-thingol. " (Осанвэ-кента, примечание 5)
Сказано, что продолжение рода связывает "духа" с плотской оболочкой (хроа), а также то, что случай с Мелиан (зачавшей и родившей ребёнка) был единственным.