What is the origin of the name Hermitian and Unitary matrix?

Question

A matrix $H$ is Hermitian if $H ^\dagger = H$. A matrix $U$ is Unitary if $U^\dagger=U^{-1}$.

My question is:

1. Why do we name matrices of such properties Hermitian and Unitary? These names are non-intuitive and have nothing to do with these properties.

2. Who named them?

3. Possible citation of first appearance in paper?

Answer 1

Hermitian is because Charles Hermite. List of things named after Charles Hermite. Unitary is because it is an extension of the concept of unit complex number.