壱与

Etymology
First attested in the, derived from.

The original pronunciation remains uncertain; however due to possibly a in ancient China, a variant  (shinjitai ) is also attested in the historical record, therefore the name can also be read as Toyo. Some sources theorize this as a copying error.

Proper noun

 * 1)  a semi-legendary queen of  who, according to tradition, was 's successor