Note: as in other univerbations withquidem (siquidem,tuquidem), the-o- in this word is regularly short, but may be long when not treated as a univerbation.[1] See quotations.
“quandoquidem”, inCharlton T. Lewis (1891),An Elementary Latin Dictionary, New York: Harper & Brothers
"quandoquidem", in Charles du Fresne du Cange’sGlossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
