These are all super popular really. Some more than others but they all fall into that category for me.
Luca is top ten (7th in England and Wales for the last year with data) add Lucca and Lucas to that, combined they become the number 1 most popular name.
Reuben is top 40 (37th) and people spell it differently all the time (Rueben, Ruben). Actually there were nearly 500 Rubens, and over 100 Ruebens as well, so if you add them all together it pushes the name up into the top 20.
There were over 1,000 little Reggies registered in one year in the data, it’s just outside the top 50. Reginald is up into the top 250 as well.
Blake is the only one outside the top 100, and only just. 104th, but if you add in the over 100 little girls called Blake it’s top 80.
Luna is a top 40 name (38), Luna-Maes are out there, some Luna-Roses, and to my bafflement quite a few Luna-Raes, which is a bit too space cadet for me.
Charlotte’s at 23 with Lottie also top 50. There are also quite a lot of Lottie-Mae, Lottie-May, Lottie-Rose, Lottie-Anne, Lottie-Lou, Lottie-Louise, Lottie-Raes, and some called Lotti.
Indie’s technically the most unusual on your entire list. 138 in the charts. Add Indy, India, Indigo and Indiana, and you’ve guessed it, the Indie-Rose and Indie-Maes and it pushes it up a bit. Interesting to see Indie is more popular as a name than India.
Lilah is top 100, 95 to be exact. add Lila though and it takes you to top 60.
Hopefully that helps you with how common things are.