The former name for the United Arab Emirates (UAE) was the Trucial States or the Emirates of Oman.
The reason these states were known as Trucial States is because of the fact that in the truce following the Ottoman wars, these states were formed because of a treaty between the Arab rulers and the British. Hence, the name Trucial states stuck and these emirates were collectively known by that name till they organized themselves into the UAE in the 1970s. The term Trucial States was given by the British and not used by the Arabs for a long time.
In these years, it was common for the Arabs to refer them as the Emirates, as there are seven states that form the present-day United Arab Emirates. These states are Abu Dhabi, Ajman, Al Fujairah, Sharjah, Dubai, Ra's al Khaymah and Umm al Qaywayn.