especially given that strong storms can move large objects around… but violet seeds are typically little nuggets, so a lighter wind probably won’t relocate them. My guess is that they may have come to your hanging basket stuck to a “dirty” tool that had been used somewhere where Johnny jump-ups grow, or from contaminated soil used to fill the hanging basket.

As the soil came from a bag and the tools are used nowhere else. I'n guessing it must have been a windblown seed that came to this baskt (I forgot to mention that this is a second floor deck)

They could be a vector for depositing the seeds.

We would be seeing Johnny jump-up volunteers everywhere. So my guess is that that is very unlikely.

One summer I had an inquisitive squirrel, and the summer I planted pineapple sage up there I had a lot of hummingbirds. I only asked because the is the first time I have ever had Johnny jump-ups.

but they are of the same genus as Johnny jump-ups and are propagated the same way!
https://sidewalknature.com/2021/11/09/violets-go-ballistic/

and certainly not in hanging baskets.