Also in a theory, 'to' in the names of Otonoji and Otonobe is thought to come from 'to' as in the 'mito no maguwai' (literally, intercourse of genitals) and therefore suggesting genitals.
また、「ト」は「ミトのマグワイ」の「ト」で、性器の象徴であるとする説もある。