Mid 16th century; earliest use found in John Hooper (d. 1555), bishop of Gloucester and Worcester and protestant martyr. From the name of Aaron + -ical.
Definition of Aaronical in US English:
Aaronical
adjectiveɛːˈrɒnɪkl
Of or relating to Aaron; Aaronic.
Origin
Mid 16th century; earliest use found in John Hooper (d. 1555), bishop of Gloucester and Worcester and protestant martyr. From the name of Aaron + -ical.