All getting a bit didactic around here. For sure, whilst it's fascinating to ponder such lineages and point out possible roots & roots, the nuances are easy over looked - like the relationship between the Karadeniz Kenemce and the Pontian Lyra. Tracing bagpipe lineages can be likewise mind-boggling. Otherwise check out Otto Anderson for more on the North European bowed-lyes; he points out that tal also relates to the pinewood used for their construction.

The spike is the forerunner of the end pins used on cellos and double basses

The cello & bass spikes are floor rests and, in any case, are absent from baroque cellos which are held between the knees much like the viol. Forerunner, is, I think, pushing it a bit as it implies a direct historical lineage.