These are things named after Ferdinand Georg Frobenius, a German mathematician.
Arithmetic and geometric Frobenius
Frobenioid
Frobenius algebra
Frobenius category
Frobenius covariant
Frobenius endomorphism (also known as Frobenius morphism)
Frobenius determinant theorem
Frobenius group
Frobenius manifold
Frobenius matrix
Frobenius method
Frobenius norm
Frobenius normal form
Frobenius number
Frobenius polynomial
Frobenius product
Frobenius pseudoprime
Frobenius reciprocity
Frobenius solution to the hypergeometric equation
Frobenius theorem (differential topology)
Frobenius theorem (real division algebras)
Frobenius–Schur indicator
Cauchy–Frobenius lemma
Perron–Frobenius theorem
Quadratic Frobenius test
Quasi-Frobenius ring