Hebrew

därän - name of a parasite worm (found in the sheep's head) (Jastrow 324)

Hbr. pB. and Jud. (one of them most probably borrowed from the other) are likely related, with a meaning shift ‘skin disease’ > ‘insect causing skin disease / damage’.

PCS

*daran- - (kind of) skin disease (SED I No. 58)

Or PWS? Probably from *dar(r/ˀ)-an-, with -n suffixed; cf. Arb. drˀ and Cha. dära, Ezha dära, Gye. dära, Muh. däna, End. däna; note also Enn. dä̃ra which may be alternatively compared to danr, with metathesis).