Lithuanian -iškas

← German -isch (cognate)

← English -ish (cognate)

← Proto-Germanic *-iskaz (mention)

← Proto-Indo-European *-iskos (derived)

← Latvian -isks (cognate)

← Proto-Slavic *-ьskъ (mention)

← Swedish -isk (cognate)

→ English -ish (cognate)

→ Latvian -isks (cognate)