In existographies, Leonhard Euler (248-172 BE) (1707-1783 ACM) (IQ:185|#15) (ID:2.57|76) (Cattell 1000:512) (RGM:91|1,350+) (PR:185|65AE / mathematician:5) (Murray 4000:16|CS / 1|M) Simmons 100:35) (GME:1) (CR:103) (LH:4) (TL:111|#98) was a Swiss mathematician, physicist, and astronomer, noted for 
The following are quotes:
- “If Gauss is prince, Euler is king.”
- — Anon (c.2000), Source; spin on Eric Bell’s 1939 §:14 The Prince of Mathematicians: Gauss 
- Bell, Eric. (1939). The Men of Mathematics: The Lives and Achievements of the Great Mathematicians from Zeno to Poincare (§:14 The Prince of Mathematicians: Gauss, pgs. 218–69). Simon.
- Leonhard Euler – Hmolpedia 2020.