Latin word lucem comes from Proto-Indo-European *álbʰos, Proto-Germanic - atjaną, and later Proto-Germanic *leuhtaz (Light, bright.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *álbʰos | Proto-Indo-European (ine) | |
| - atjaną | Proto-Germanic (gem-pro) | |
| Ἀλβανοί | Ancient Greek (to 1453) (grc) | |
| *lewk- | Proto-Indo-European (ine) | |
| *leuhtaz | Proto-Germanic (gem-pro) | Light, bright. |
| *luhatjaną | Proto-Germanic (gem-pro) | To sparkle, to flash brightly. |
| 𐌻𐌰𐌿𐌷𐌰𐍄𐌾𐌰𐌽 | Gothic (got) | To lighten, flash with lightning. |
| *louks | Proto-Italic (itc-pro) | Light. |
| lux | Romagnol (rgn) | |
| lucis | Latin (lat) |