Cognomen ルシア (Lucia 
, Lucía 
, Lúcia 
) , globally, is a widespread surname. The last name ルシア is characteristic of Latin America and the Caribbean, particularly Mexico, where it is a common surname, Uruguay, and Nicaragua (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Mexico, Spain, and Argentina. More prevalently, ルシア is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lucia | Italy, Philippines, Mexico, Argentina, Brazil |
| Lucía | Italy, Spain, Mexico, Argentina, Brazil |
| Lúcia | Italy, Spain, United States, Argentina, Brazil |
| ルシア | Japan |
Lleucu, Llucia, Llúcia, Loukia, Lsia, Luca, Luce, Luci, Luciane, Lucie, Lucija, Lucilla, Lucille, Lucina, Lucja, Lucy, Lucyna, Lushia, Lusia, Luzi, Luzia, Luzie, Lúcía, Lūcija, Rshia, Rsia, Rushia, Rusia, Łucja, Λουκία, Лукия, Лукія, Луси, Лусия, Луци, Луцие, Луций, Луция, Луцыя, Люси, Люсиль, Люсия, Люсі, Люсіль, Լուսի, לוסי, לוציה, لوسي, لوسيا, لوسيل, ルシル, ルーシー, 盧西, 露琪, 露西, 露西亚, and 露西雅