Cognomen Karlijn (Karlijn 
) , around the world, is an extremely rare surname. The family name Karlijn is habitual in Western Europe, particularly Netherlands, where it is a very rare surname, and Germany, where it is an extremely rare surname. Much more frequently, Karlijn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karlijn | Sweden, Belgium, Italy, Australia, Netherlands |
Carla, Carlijn, Carlota, Carola, Caroleena, Carolien, Carolina, Caroline, Carolyn, Carolyne, Karoliina, Karolina, Karoline, Karolyn, Karolína, Καρολίνα, Караліна, Каролин, Каролина, Каролине, Кароліна, Керолін, Кэролайн, קרוליין, קרולין, קרולינה, كارولين, كارولينا, カロリン, カロリーナ, カロリーネ, キャロライン, and 卡罗琳
De, Jonker, Nijboer, Heuvel, Visser, Martens, Brouwer, Janssen, Joosten, Nijhuis, Hermans, Willems, Scholten, Schouten, Swinkels, Kuijpers, Driessen, Goossens, Hendriks, Verhagen, Stockmann, Vermeulen, Jacobs, Jansen, Peters, Bakker, Cox, Bos, Kok, Pol, Vos, Maas, Meer, Smit, Berg, Boer, Verhoeven, Dijk, Jong, Veld, Smits, Broek, Derks, Groot, Vries, Meijer, Mulder, Simons, Jans, and Van Den Berg