Throughout the world, Tennakoon (Tennakoon 
) is an extremely rare masculine forename. Much more prevalently, Tennakoon is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Tennakoon | Australia, Bangladesh, United Arab Emirates, Indonesia, Sri Lanka |
| mudiyanse tennakoon Sri Lankan politician, LK (b. 1934) |
|
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| sampath tennakoon Sri Lankan actor, LK (b. 1959) |
|
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| sampath tennakoon researcher |
|