hapax at Knossos
Definitions
McArthur 1993: uncertain ethnic adjective
Chadwick & Ventris 1973: ethnic adjective? cf. Λέριος?
References
Chadwick, John and Michael Ventris, 1973 Documents in Mycenaean Greek
McArthur, Jennifer, 1993 Suplementos a MINOS núm. 9 "Place-Names in the Knossos Tablets Identification and Location"
After diving deeper into the context of re-ri-jo, I would like to tentatively suggest that it is a Knossian spelling of ri-jo. re-ri-jo appears in the context of e-re-ta on KN C 902, and all three tablets mentioning e-re-ta in the PY An series include ri-jo. The PY Ad tablet which mentions e-re-ta-o doesn’t have evidence of ri-jo, but it does have a-pu-ne-we, which also appears on 2 of the the e-re-ta tablets of the PY An series as a-po-ne-we.
I’d like to check the chronology of the tablets here – it may be another example of Mycenaean haplology, cf. a-pi-po-re-we evolving towards a-po-re-we.