[SunkenCiv]

Runes were obviously not derived from the Latin alphabet.

[muawiyah]

hällristninga are not runes, but pre-runic. They contain some things that kinda sorta look like later alphabetic inclusions but they also contain things we are forced to conclude are simply "signs" and not references to vocalizations.

In any case, runes were used by Indo-European peoples, not the more ancient Sumerian and Sa'ami culures.

Runic alphabets also underwent serious changes as they were handed around from one group to another. The letter "X", for example, has at least two dozen different sounds assigned to it depending on language using it in a runic alphabet.