The quest for the root and archeology of ideas and applications is fascinating.
With all due respect with well known scientists like Leibniz, the distribution of your ideas was and remains to be key to be named. It is always nice to keep searching for prior influences and inventions.
Unless people are willing to forge "unpublished manuscripts" to gain priority. Need to be careful with that stuff - even when those are legit, the fact that they were not published immensely increases the complexity of priority. Imagine some goat herder invented binary in 4000 BC without telling anybody.
With all due respect with well known scientists like Leibniz, the distribution of your ideas was and remains to be key to be named. It is always nice to keep searching for prior influences and inventions.