Pronounced in Latin as SEE-lus (/ˈkae.lus/), Caelus derives from the Latin caelum (“sky” or “heaven”) and occupies a foundational role in Roman mythology as the personification of the firmament, parallel to the Greek Uranus; its phonetic construction—marked by a hard initial consonant blend followed by a sustained vowel—imparts an air of classical refinement. Within Anglo-American naming conventions, Caelus is distinguished by a confluence of mythic resonance and linguistic precision, a distinction borne out by its gradual uptick in the United States: 6 recorded births (rank 937) in 2022, 10 (rank 919) in 2023 and 12 (rank 912) in 2024. This measured ascent, when viewed through demographic data, underscores a deliberate preference for names that combine historical gravitas with distinctive sonority.