Yevanic, otherwise known as Yevanika, Romaniote and Judeo-Greek, was the language of the Romaniotes, the group of Greek Jews whose existence in Greece is documented since the 4th century BCE. Its linguistic lineage stems from Attic Greek and the Hellenistic Koine(Κοινή Ελληνική) and includes Hebrew elements as well. It was mutually intelligible with Greek. The Romaniotes used their version of the Hebrew alphabet to write Greek and Yevanic texts.
Remnants of the Romaniotes have survived in Yannena (Epirus) and the USA (Kehila-Kedosha-Janina Synagogue in New York City, built in 1927, is a gathering spot for these Greek Jews).