Worldwide, Sielke (Sielke 
) is a very rare predominantly girly, but very seldom male forename. The first name Sielke is habitual in Western Europe, particularly Belgium, where it is a rare female name. Also, Sielke is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sielke | Germany, Mexico, Brazil, Belgium, United States |
| sielke de mulder |
|
|
| sielke barrez badminton player, BE (b. 1991) |
|