behappen means perhaps, mayhap. Lexicurio rates it Sui generis — a strength score of 91 out of 100.
Etymology
From Middle English behappenen, equivalent to be- + happen, analogous to befall.
adv
- Perhaps, mayhap.“Behappen it ul rain.”
verb
- To happen to, to befall.“"But why have ye," said Artegall, "forborne
Your owne good shield in daungerous dismay?
That is the greatest shame and foulest scorne,
Which unto any knight behappen may.
To loose the badge that should his deedes display."”