Throughout the world, Sillar (Sillar 
) is a rare epicene forename. The given name Sillar is characteristic of Tanzania, where it is a very rare male name, and India, where it is an extremely rare epicene name. More frequently, Sillar is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sillar | Australia, Estonia, Philippines, United Kingdom, India |
|
rein sillar Estonian civil servant (b. 1948) |
|
| roy allen sillar (b. 1894) |
|
Mr, Raya, Raul, Rene, Rico, Ruel, Rham, Dana, Gina, Gima, Leny, Leah, Lito, Lope, Loey, Lyda, Jane, Jade, Jose, Joel, Jill, Jigg, Bill, Tina, Aiza, Anne, Ms, Ana, Ann, Ben, Bob, Kim, Ray, Don, Lea, Jon, Joy, Jeb, Tom, Tim, Nat, Mary, Mike, Mimi, Sven, Alma, Anna, Anny, and Norm