Yvette Estermann born as Gavlasova (born 1967), Swiss politician, member of the National Council from the Canton of Lucerne
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Theodor Estermann (1902–1991), mathematician, working in analytic number theory
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Alois Estermann (1954–1998), senior officer of the Swiss Guard, murdered in his apartment in the Vatican City
The text Bugie di sangue in Vaticano (1999), written by "a group of Vatican ecclesiastics and lays who cannot continue to avail, with their silence, official truth told by the Vatican", supports the hypothesis that Estermann was the Pope's personal guard, and that he was killed in the course of a supposed struggle between the Opus Dei and masonic parties within the Vatican hierarchy, both attempting to annex the Swiss guard.