Origin: ME caiser, prob. via ON keisari, akin to OFris keisar, OHG keisar < Goth kaisar, ult. < L Caesar, family name of first Roman emperors; reinforced, esp. in senses 2b & c, by Ger kaiser
See kaiser in American Heritage Dictionary 4
Origin: , from Middle High German keiser
Origin: , from Old High German keisar
Origin: , from Latin Caesar; see caesar.
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