My biggest gripe with mathematical naming isn't what the author wrote, but by the inconsistency of noun/adjective endings. For example, Hermitian and Brownian are adjectives, much like Ethiopian or Libertarian or anything else ending in -ian. But Hamiltonian, Jacobian, and Lagrangian are nouns. I'd much prefer they be called the Hamilton, the Jacob, and the Lagrange, for consistency in syntax in parsing.

It always trips up my mental English parser when someone says "the Hamiltonian" and I'm always like "the Hamiltonian what? what is or isn't Hamiltonian?"