An Etymological Dictionary of the German Language/April

by Friedrich Kluge

April, m., ‘April,’ from the equiv. MidHG. aprille, aberëlle, m.; from Lat. Aprilis (comp. Fr. avril, Ital. aprile), borrowed at the beginning of the MidHG. period in place of the genuine OHG. ôstarmânôd, ‘Easter-month.’