This one is controversial, but wouldn't it be cool.
Sanskrit सिंह siṃha "powerful one, lion" is the source of the personal name Singh, thru Hindi (says the OED).
The Sanskrit word is found in Sri Lanka's Sinha Stout, and also in the language Sinhala.
The American Heritage Dictionary tells us that the name for Singapore is from Sanskrit, being a combination of siṃha and pura "city". It goes on to say that the origin of siṃha is unknown, but that it's probably related to Swahili simba - I have no idea how.
In fact most dictionaries don't give an etymology for siṃha. The Cologne Digital Sanskrit Lexicon is the only source I could find that does - it says siṃha is probably from sah "to prevail, be victorious; to resist". The IEED project's Indo-Aryan inherited lexicon asserts that sah is from Proto-Indo-European *seǵʰ- "to hold".
*seǵʰ- became Proto-Germanic *siǥiz- "victory", then Old High German Sigifrith meaning "having victorious peace" (-frith "peace" is from *priH-), then modern German Siegfried.