Hebrew

ḳayyān - one having abnormally large testicles (Jastrow 1359)

Suggests a non-reduplicated stem underlying Sem. *ḳīḳ(-­at)-­, which is probably to be reconstructed as *ḳayḳay-.­

PWS
*ḳīḳ(-at)- - egg (SED No. 160)
A difficult case. Meanings differ substantially, though all semantic shifts appear plausible, like ‘egg’ > ‘testicle’ in Hbr. pB. (cf. Rus. яичко meaning both ‘little egg’). and ‘testiculus’).