i'm surprised the Dodge logo wasn't listed... since it started out for the first 20 years being a Star Of David... then various non-evolving things since then. none of them with any relation to any others it seems. pentastar... a rams head. pretty random.

http://www.allpar.com/history/logos.html
...has some history / speculation.

http://www.cartype.com/page.cfm?id=799&alph=ALL
... has some pics of the early logos.