Jacques Harrewyn (1660–1727)：January is named after the Roman god Janus.

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Jacques Harrewyn (1660–1727)
Alternative names	Jacobus Harrewijn, Jacques Harrewijn
Description	Flemish engraver
Date of birth/death	1660

https://commons.wikimedia.org/wiki/Category:Jacobus_Harrewijn

British Museum

January is named after the Roman god Janus. He had two faces to see the future and the past! This engraving of Janus by Dutch artist Jacobus Harrewyn was made in 1698 http://ow.ly/VIGKt