Cf. discussion in Kogan 2001:281-282.
Also attested as ḫullu. Due to Arb. and other Sem. cognates, can neither be separated into two lexemes, i.e. ḫullu and ullu, nor treated as a Sumerian loanword (Kogan 2001:281).
Written as ḫu-ul-lu as a gloss to Akk. nīru in EA 296:38 and as ḫu-li in EA 257:15.