Wilhelm
Meaning
German cognate of William ("will helmet"); famously borne by Wilhelm Röntgen, physicist who discovered X-rays and won the first Nobel Prize in Physics
The story
Wilhelm is the German cognate of William, will and helmet in the old elements, a name of emperors and composers. Science remembers Wilhelm Röntgen, the physicist who in 1895 noticed a mysterious glow in his darkened laboratory, realized he had found rays that pass through flesh to photograph bone, named them X-rays for their unknown nature, and in 1901 received the very first Nobel Prize in Physics, declining on principle to patent the discovery. American records tell a sharper story: Wilhelm appears in the 1890s and 1900s, then fades from the chart just as a Kaiser named Wilhelm led Germany into the First World War and German names became a hard sell; we cannot prove the connection, but the timing is hard to ignore. Only in the 2020s does a flicker return, leaving Wilhelm feeling like a recovered heirloom: grand, Old World, newly wearable.
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Wilhelm has stayed rare in US records the whole time: no peak decade to name.
See popularity in Brazil
Popularity in Brazil
199 people · the #25,489 first name in Brazil · about 1 in 1,000,000 · median age 49
Source: IBGE, Censo Demográfico 2022
The Wilhelm deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Wilhelm truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Wilhelm fits with your family’s names and surname.
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