Žambakas

Cf. Žùmbakis, Žumbakỹs (see). Perhaps compound surn. from zamb-ak-. For jamb - cf. lit. zam̃bas, zam̃bis, in-zambùs „įstrižas, įkypas“ (DLKŽ), see below Žam̃bis. Sandas ak- is from lit. eyes