Source-basedRising

Johan Cortlever

Dutch swimmer (1886–1972)

Lived 1886–1972, aged 86

Summary

Updated 2026-07-06

Johan George Cortlever was a Dutch backstroke swimmer and water polo player who competed in the 1908 Summer Olympics and in the 1920 Summer Olympics.

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By the numbers

The six component signals behind the Fame score, and their ranks across the leaderboards.

Fame

Rising

35.5

Composite of search demand, mentions, audience & graph footprint.

Score components

Momentum5.4

Historical5.7

Source confidence35.0

Completeness25.0

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