Throughout the world, Janien (Janien 
) is a rare epicene given name. The forename Janien is habitual in the Democratic Republic of the Congo, where it is a rare boy's name, Belgium, where it is a rare female name, and South Africa. In absolute terms, it is commonest in the Democratic Republic of the Congo, South Africa, and Philippines. Much less frequently, Janien is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Janien | Philippines, Belgium, Democratic Republic of the Congo, United States, South Africa |
Uys, Walton, Montank, Mcgowan, Shalabi, Strauss, Baldwin, Preston, Lau-Thompson, Olivier, Stephens, Balgemann, Thompson, Harrison, Hammonds, Severance, Audiffred, Nuijten-Colans, Valentine, Du Plessis, Guntermann, Gelderblom, Tucker, Turner, Kiwiet, Culver, Slot, Rhen, Ryke, Dial, Tolo, Wang, Akers, Canel, Botha, Brown, Schillebeeks, Kluge, Linde, Junio, Ferry, Orris, Meulen, Saloma, Strong, Añosa, Cahill, Colvin, Perry, and Vandenbosch