Snake eyes (updated)

The Etruscan numeral zal¹, es(a)l '2' is attested in dice -Etruscans were affectionate of gambling- and inscriptions, and it's also part of esl-em zaθrum '18' (lit. '2 from 20'), where za-θ-r-um '20' can be analized as the concatenation of '2' with locative, plural and collective suffixes, i.e. 'collection of things in twos'².

Although some amateur linguists have proposed links to either East Caucasian (Nakh-Daghestanian) or Hurrian, there're no obvious parallels elsewhere. However, Etruscan ci '3' is related (most likely due to borrowing) to Hurrian kig '3', a Hurro-Urartian isogloss shared with Nakh *qo-, with an optional suffix used for sheep counting. This is particulary interesting, because this numeral strongly resembles Daghestanian and West Caucasian (Abkhaz-Adyghe) '2' (NCED 2315)³, while at the same time both Hurro-Urartian and Nakh borrowed their numeral '2' from Semitic⁴.

As it happens, numerals aren't too much old (Neolithic at the most) and in many cases they're loanwords or even Wanderwörter⁴, so they're of little value for establishing distant language relationships.
______________________________________________________________________

¹ Etruscan z stands for an affricate /ts/.

² E. Robertson (2006): Etruscan's Genealogical Linguistic Relationship with Nakh-Daghestanian: A Preliminary Evaluation.
³ IE *dwo '2' is likely a loanword from West Caucasian.
⁴ Some Semitic numerals, namely '7', spread as such to IE and other language families.