It's a bit silly to chase down original authorship of an idea that is a minor detail visible to many people who work in a field.
It's like asking who was the first person to discover that all multiples of 11 have the same parity in the respective sums of their odd and even digits.
It's like asking who was the first person to discover that all multiples of 11 have the same parity in the respective sums of their odd and even digits.