Where does “Sumatra” come from?

Sumatra (Cebuano) comes from Indonesian Sumatra, from Malay Sumatera, from Sanskrit समुद्र, from Sanskrit सम्-, from Proto-Indo-Iranian sam-, from Proto-Indo-European sem- — together, one.

Ancestry of “Sumatra”, step by step

StepLanguageWordMeaning
1IndonesianSumatra—
2MalaySumatera—
3Sanskritसमुद्रthe sea; ocean
4Sanskritसम्-with, together with, along with, together,...
5Proto-Indo-Iraniansam-together, joint, paired
6Proto-Indo-Europeansem-together, one
Every word from Proto-Indo-European sem- →Every word from Sanskrit सम्- →Every word from Sanskrit समुद्र →