Sources and licenses

Cellarius Horoscope does not make up the meaning of a first name. Every meaning in our fixed name list is summarized in our own words from a stored source text; the source is shown below the meaning with a link.

Wikipedia and Wiktionary

The meanings come from Wikipedia articles and from Wiktionary. These texts are licensed under CC BY-SA 4.0. The authors are listed in the history of the article we link to for each name. We have adapted the texts: they are shortened, translated and summarized in our own words.

Wikidata

Data about the name itself, such as gender and the link to the article, comes from Wikidata. That data is released under CC0.

Which names are in the list

The English list was chosen from commonly given names: the top names of the Office for National Statistics for England and Wales (2025) and of the US Social Security Administration (birth years 1995 through 2024). We only used them to choose which names to include; nothing else was taken from them.

Contains public sector information licensed under the Open Government Licence v3.0.

The Dutch list is our own selection, supplemented with the ten most given names of 2025 according to the Sociale Verzekeringsbank. It is a judgment, not a count.

The name list itself

Our name file, with the meanings and the source references, is released under the same license: CC BY-SA 4.0. You may reuse it with attribution and under the same terms.

Is a name missing?

For a first name that is not in the list you can ask for an AI guess with one click. That guess is not checked and does not come from these sources.

Hubble photos on the sign pages

The photos at the top of the sign pages come from the ESA/Hubble website and are licensed under CC BY 4.0. Each photo carries its full credit line, unaltered. We cropped and resized the photos.

Aries: NGC 772. Credit: ESA/Hubble & NASA, A. Seth et al. Licensed under CC BY 4.0 · ESA/Hubble
Taurus: Crab Nebula (M1). Credit: NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble). Licensed under CC BY 4.0 · ESA/Hubble
Gemini: Eskimo Nebula (NGC 2392). Credit: NASA, ESA, Andrew Fruchter (STScI), and the ERO team (STScI + ST-ECF). Licensed under CC BY 4.0 · ESA/Hubble
Cancer: NGC 2775. Credit: ESA/Hubble & NASA, F. Belfiore, J. Lee and the PHANGS-HST Team. Licensed under CC BY 4.0 · ESA/Hubble
Leo: Messier 66. Credit: NASA, ESA and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration. Acknowledgement: Davide De Martin and Robert Gendler. Licensed under CC BY 4.0 · ESA/Hubble
Virgo: Messier 87. Credit: NASA, ESA, A. Lessing (Stanford University), E. Baltz (Stanford University), M. Shara (AMNH), J. DePasquale (STScI). Licensed under CC BY 4.0 · ESA/Hubble
Libra: NGC 5793. Credit: NASA, ESA, and E. Perlman (Florida Institute of Technology) Acknowledgement: Judy Schmidt. Licensed under CC BY 4.0 · ESA/Hubble
Scorpio: Butterfly Nebula (NGC 6302). Credit: NASA, ESA and the Hubble SM4 ERO Team. Licensed under CC BY 4.0 · ESA/Hubble
Sagittarius: Lagoon Nebula (M8). Credit: NASA, ESA, STScI. Licensed under CC BY 4.0 · ESA/Hubble
Capricorn: Messier 30. Credit: NASA/ESA. Licensed under CC BY 4.0 · ESA/Hubble
Aquarius: Helix Nebula (NGC 7293). Credit: NASA, ESA, C.R. O'Dell (Vanderbilt University), and M. Meixner, P. McCullough, and G. Bacon (Space Telescope Science Institute). Additional data: Mosaic II camera on the 4-meter telescope at Cerro Tololo Inter-American Observatory (CTIO). Licensed under CC BY 4.0 · ESA/Hubble
Pisces: Messier 74. Credit: NASA, ESA, and The Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration. Licensed under CC BY 4.0 · ESA/Hubble

Images on the weekly and monthly pages

The images above the weekly horoscope come from Hevelius's Firmamentum Sobiescianum (1690; scans by ETH-Bibliothek Zürich via e-rara, Public Domain Mark; the library asks for credit naming the work, its location and the DOI). The images above the monthly horoscope come from Urania's Mirror (Sidney Hall, 1825; scans from the Library of Congress, Prints and Photographs Division, in the restored versions by Adam Cuerden via Wikimedia Commons). Both are in the public domain. Hevelius drew the figures mirrored compared with the sky; Urania's Mirror shows them as seen in the sky. The images have been cropped and resized.

Aries: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. BB (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 16 (Library of Congress cph.3g10064; Wikimedia Commons). License: Public domain.
Taurus: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. CC (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 17 (Library of Congress cph.3g10065; Wikimedia Commons). License: Public domain.
Gemini: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. DD (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 18 (Library of Congress cph.3g10066; Wikimedia Commons). License: Public domain.
Cancer: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. EE (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 19 (Library of Congress ds.00242; Wikimedia Commons). License: Public domain.
Leo: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. FF (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 20 (Library of Congress ds.00241; Wikimedia Commons). License: Public domain.
Virgo: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. GG (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 21 (Library of Congress cph.3g10067; Wikimedia Commons). License: Public domain.
Libra: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. HH (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 22 (Library of Congress cph.3g10068; Wikimedia Commons). License: Public domain.
Scorpio: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. II (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 23 (Library of Congress cph.3g10069; Wikimedia Commons). License: Public domain.
Sagittarius: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. KK (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 24 (Library of Congress cph.3g10070; Wikimedia Commons). License: Public domain.
Capricorn: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. LL (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 25 (Library of Congress cph.3g10071; Wikimedia Commons). License: Public domain.
Aquarius: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. MM (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 26 (Library of Congress cph.3g10072; Wikimedia Commons). License: Public domain.
Pisces: Johannes Hevelius, Firmamentum Sobiescianum, 1690, Fig. NN (e-rara) · Sidney Hall, Urania's Mirror, 1825, plate 27 (Library of Congress cph.3g10073; Wikimedia Commons). License: Public domain.

ETH-Bibliothek Zürich, Rar 9629: 1 (e-rara): doi.org/10.3931/e-rara-456 (Public Domain Mark 1.0). Restored by Adam Cuerden.

Sky calendar

The sky calendar is calculated with Astronomy Engine (MIT license, Don Cross) and tested against NASA's eclipse catalog (Fred Espenak) and our own calculation engine (Skyfield, JPL DE440). Meteor shower peaks follow from the solar longitude of the maximum in the table of the RASC Observer's Handbook 2025; radiant and speed come from the IAU Meteor Data Center (Jenniskens et al. 2020; Jopek and Kaňuchová 2017). For the Draconids: Trigo-Rodríguez et al., MNRAS 433, 560 (2013). The supermoon rule is Nolle's. Nothing was copied from the IMO calendar.

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