Hydrogen-containing ion names?

Hydrogen-containing oxoanions:
Oxoanions may also have hydrogen bonded to one of the oxygen atoms.
These oxoanions can be thought of as arising either from

successive removal of H⁺ from the polyprotic oxoacids which have the formulae shown to the left or
successive addition of H⁺ to the corresponding oxoanion.

H₃PO₄ → H₂PO₄^– (dihydrogenphosphate ion) → HPO₄^2– (hydrogenphosphate ion) → PO₄^3–
H₂SO₄ → HSO₄^– (hydrogensulfate ion) → SO₄^2–
H₂CO₃ → HCO₃^– (hydrogencarbonate ion) → CO₃^2–
H₂SO₃ → HSO₃^– (hydrogensulfite ion) → SO₃^2–

Polyatomic cations:
Two important polyatomic cations are derived from addition of H⁺ to the molecules H₂O and NH₃ (ammonia).
Note that both of these cations have an -ium ending.

NH₄⁺ (ammonium) H₃O⁺ (hydronium)

Polynuclear oxoanions:
Some elements form oxyanions containing two atoms of the element.
Two are sufficiently common to be on the "must learn" list.

S₂O₃^2– (thiosulfate) Cr₂O₇^2– (dichromate)
Note that thiosulfate is sulfate (SO₄^2–) with one of the oxygen atoms replaced by sulfur.