I had an idea where Swaziland was but couldn't find it on the map. Now it's Eswatini. I can't keep up.
Madagascar -> Indonesia Fun fact; Madagascar was almost completely untouched by humans until around 500 CE give or take a couple centuries. It was first colonized by Indonesian settlers, much like the Polynesians who spread across the Pacific to places like Hawaii and Easter Island. Palembang Sultanate, Indonesia Dated 1789 CE (1203 AH) but likely in decades after Issued under Sultan Muhammad Bahaudin Contemporary counterfeit, displays crude and illegible Arabic Unlisted but most similar to FSR#9.50
Malaysia -> Singapore/Sumatra Singapore Merchants Token 1 Keping 1804 (1219 AH) Island of Sumatra KM#Tn1
Brunei -> China Ming Dynasty of China 1368-1398 CE AE Cash; 2.83g 24mm Hong Wu Tong Bao Hartill#20.57