What does "these things are in the ether" mean? The context of the sentence is
My own daughters' names are Freya, a more popular name across the pond than in the US, and Calla, which last trended as a baby name in 1880. Although the week Freya was born we learned of two other baby Freyas in our Brooklyn neighborhood. And a former colleague also had a little girl named Calla. So these things are in the ether somehow.