Akkadian

ḳūḳānu - an insect, a disease (CAD Q 312; AHw. 928)

var. gūḳānu, gūḳḳānu. As an animal name attested in lex. list only.

PS
*ḳV(n)ḳVn- - kind of worm, insect (SED II No. 132)