predominately

predominate (“adjective”) +‎ -ly

predominately (comparative more predominately, superlative most predominately)

1. (dated or nonstandard) In a predominate manner; predominantly.
   • 2011, Helen R. Haines, “A Rat by Any Other Name: Conflicting Definitions of “Dinner” in Belize, Central America”, in Helen R. Haines, Clare A. Sammells, editors, Adventures in Eating: Anthropological Experiences in Dining from Around the World, Boulder, Colo.: University Press of Colorado, →ISBN, section I (The Main Course), page 45:

     In the case of gibnut (Agouti paca), however, my memories are occupied predominately with my efforts to avoid eating this creature.

• This is the adverb form of the adjective predominate, to which predominant is now preferred. Likewise, predominantly is now preferred over predominately, although the latter is 100 years or so older.