Abstract: The present study describes the ten attested signs of the Cretan Protolinear script which render disyllabic phonetic values, unlike the monosyllabic ones of the Consonant-Vowel type, which is the common phonetic pattern for the rest of the signs. The Cretan Protolinear script has been proposed as the script that all the Aegean scripts of Bronze Age evolved from. The linguistic affinity of these disyllabic signs to the Sumerian language is demonstrated, in terms of lexicographic reference, phonetic correspondence and pictographic resemblance. In addition, the description of these signs’ phonetic features is accompanied by valuable cultural information, wherever available.