Cognomen Λουκάς (Lucas 
, Lukas , Loukas 
) , in all the world, is a widespread last name. The surname Λουκάς is habitual in Seychelles, where it is a common surname, Namibia, and Jersey (explore the name in all countries). Not in comparison with a country's population, the name is most common in the United States, Tanzania, and Brazil. More frequently, Λουκάς is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lucas, Lukas | Mexico, Brazil, United States, Tanzania, Argentina |
| Loukas | Germany, France, Brazil, United States, Argentina |
| Λουκάς | Greece |
Loucas, Loukis, Luc, Luca, Lucius, Lucjan, Lucjusz, Luka, Lukasz, Luke, Lukáš, Luuk, Luukas, Łukasz, Λουκής, Лик, Лук, Лука, Лукас, Лукаш, Лукий, Лукій, Луций, Люк, Люсиус, Люций, Люциус, Люциуш, לוק, לוקאס, لوقا, لوك, لوكا, لوكاس, ლუკა, ルカ, ルカス, ルカーシュ, ルーカ, ルーカス, ルーク, 卢克, 卢卡, 卢卡斯, 盧克, and 路克
| ιωάννης λουκάς Greek rower, GR |
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| σπύρος λουκάς Greek actor, GR |
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| γιώργος λουκάς Greek actor, GR |
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Δελλιος, Παπαϊωάννου, Διαμαντής, Ελευθεριάδης, Παπαθανασίου, and Παπαγεωργίου