What are all twelve months of the year named after?

January - a god, Janus

February - a Latin Word

March - a god, Mars

April - a Latin verb meaning 'to open'

May - a godess, Maia

June - a god, Juno

July - a ruler, Julius Caesar

August - a ruler, Augustus

September - a numeral meaning 'seven'

October - a numeral meaning 'eight'

November - a numeral meaning 'nine'

December - a numeral meaning 'ten'