Saudi Arabia and Oman
Yemen, Somalia, and Djibouti border the Gulf of Aden.
A border separating two countries is called an international border or a national border.
Yemen shares its borders with Saudi Arabia and Oman. Its coastline lies along the Red Sea and the Gulf of Aden.
Do you mean countries? If you do, the two countries that border the U.S. are Canada and Mexico.
Yemen and Oman are at the southern end of the Arabian Peninsula.
Yemen and Oman border Saudi Arabia to the south.
Yemen, Somalia, and Djibouti border the Gulf of Aden.
Egypt and Yemen.
yemen
Oman and Iran are the only countries that border the Gulf of Oman.
Yemen was two countries until 1990.
Yemen and Oman.
If the Gulf of Aden where in the center then Yemen, Djibouti, Somalia, and the Indian Ocean border the Gulf (with Yemen to the North, working counter-clockwise)
Egypt, Sudan, Soudi Arabia and Yemen
Yemen was two countries until 1990.
Yemen
Somalia, Djibouti, Yemen, Oman, Iran, Pakistan, India, United Arab Emirates, The Maldives.