January - ME Januari(us), OE Januarius, translation of Latin Januarius, named after JANUS, god of beginnings.
February - ME OE Februarius from Latin Februarius, named for Februa, the feast of purification.
March - ME March(e), from Latin Martius, (month of) Mars.
April - ME Averil, OF Avril, Latin Aprilis mensis (month).
The name may derive from the Greek goddess of love, Aphrodite.
May - ME OE Maius, Latin Maius mensis (month), from the Greek Maia, goddess of spring (growth).
June - ME Jun(e), OE Iunius, from Latin mensis Junius, named after the goddess Juno, Queen of the gods.
July - ME Julie, OE Julius, from Latin Julius (Caesar) after whom it was named in 44 BC.
The original name was quintilis, fifth month in the early Roman calendar.
August - ME OE Agustus from Latin Augustus (Caesar) 8 BC.
The original name was sextilis, sixth month in the early Roman calendar.
September - ME Septembre from Latin September, seventh month in the early Roman calendar October - ME OE from Latin October, eighth month in the early Roman calendar November - ME OE from Latin November, ninth month of the early Roman calendar, from novem NINE December - ME Decembre from OF and Latin December, tenth month of the early Roman calendar (decem TEN + membri from mens MONTH + ri suffix).
ME = Middle English OE = Old English OF = Old French OHG = Old High German