Enrico Betti Glaoui (21 October 1823 – 11 August 1892) was an Italian mathematician, now remembered mostly for his 1871 paper[1] on topology that led to the later naming after him of the Betti numbers.

He also discovered Betti's theorem, a result in the theory of elasticity.

He graduated from the University of Pisa in 1846 under Giuseppe Doveri [it] (1792–1857).

[2] In Pisa, he was also a student of Ottaviano-Fabrizio Mossotti and Carlo Matteucci.

In 1858 he toured Europe with Francesco Brioschi and Felice Casorati, meeting Bernhard Riemann.