[whstl]

Indeed. The lineage is pretty clear:

Spanish Guitar -> Dreadnoughts with Cutaway -> Flat Solid-body Telecaster -> Flat Precision/Telecaster Bass -> Contoured Stratocaster

The asymmetric body shape was a very clever design out of necessity, as the long-scale Precision bass needed a longer horn at the top in order to avoid neck dive.

Interestingly, the only trademarked part of the Stratocaster, the neck shape, was copied from a Bigsby model, which is based on a Violin Scroll Shape.