Original: Before the name Johor was adopted, the area south of the Muar River to Singapore island was known as Ujong Tanah or 'land's end' in Malay, due to its location at the end of the Malay Peninsula.
Simplified: Before the name Johor was taken up, the area south of the Muar River to Singapore island was known as Ujung Tanah or 'land's end' in Malay, due to its location at the end of the Malay Peninsula.