What is the meaning of Hl?

Symbol for hectoliter , an SI unit of fluid measure equal to 10 liters .

A letter of the Aleut alphabet, written in the Latin script.

A letter of the Haida alphabet, written in the Latin script.

I (1st person singular personal pronoun, weak-A)

A letter of the Choctaw alphabet.

A digraph in Xhosa orthography.

Source: wiktionary.org