One idea. A hundred traditions.
Most name sites sort names alphabetically, or by where they come from. This sorts them by what they mean — then puts the traditions side by side, so you can see the same human wish surfacing in Kazakh, Tamil, Yoruba, Greek and Norse at once. Sometimes the roots are even shared.
Look at enough names and a pattern surfaces: the same handful of ideas, reached for again and again, in languages that never met. Light. The moon. Courage. Peace. A daughter as something given.
Some of those repetitions are coincidence — there are only so many things a parent wants to say. But some are not, and the difference is the interesting part. Roots travel in two quite distinct ways, and once you can tell them apart the map of names starts to read like a map of history.
Inheritance
The first way is descent. Sanskrit rājñī and Latin rēgīna both mean queen, and they resemble each other because both come down from a single ancestor — the Proto-Indo-European root reconstructed as *h₃rēǵs, a ruler. Nobody borrowed anything. Speakers in India and speakers in Italy inherited the same word from a common source thousands of years before either language was written down. Rani and Regina are cousins, several millennia removed.
The same is true of the moon. Persian māh, Sanskrit mās, Latin mēnsis and the English words moon and month all descend from one Indo-European root for the measured cycle of the sky. A Persian girl named Mahnoor and the English word month are carrying the same syllable, four thousand years apart.
Diffusion
The second way is borrowing — and it usually follows a religion, an empire, or a trade route rather than a family tree. The Arabic nūr, light, is not related to any Indo-European word for light. It spread because Islam spread. You will find it in Turkish, Persian, Urdu, Malay, Hausa and Swahili — languages from four unrelated families — because they share a faith, not an ancestor.
Greek Sophia travelled the same way through Christendom, and Hebrew names moved across Europe on the back of the Bible rather than by descent.
So when two names on the same page look alike, one of two histories is behind it: a shared great-grandparent, or a shared book. Each page in the Atlas tries to say which.
How to read these pages
Each concept below gathers the names in this library whose meanings turn on one idea, then groups them by the tradition they come from. Where a root genuinely recurs across a language family, it is set out at the top of the page. Where we cannot vouch for a connection, we list the names and say nothing — a resemblance is not an etymology, and this site would rather show you less than tell you something untrue.