From Middle English bechen, from Old English bēċen (“made of beechwood, beechen”), equivalent to beech + -en. Cognate with Dutch beuken (“beechen”).
"beechen." YourDictionary, n.d. Web. 15 August 2018. <http://www.yourdictionary.com/beechen>.
beechen. (n.d.). Retrieved August 15th, 2018, from http://www.yourdictionary.com/beechen