What are the 2 houses of legislative branch called?

(Note: as you didn't specify which country you are referring two, remember that not all countries have 2 houses in their Legislative branch. Some have only one.)

In the United States, the two houses are the House of Representatives, and the Senate.

In the United Kingdom, the two houses are the House of Commons and House of Lords.

In Japan, the two houses are the House of Representatives and the House of Councilors.

Israel's legislature is made up of but a single house, the Knesset.