List of Famous people who died at 51

Julio César Toresani was an Argentine football midfielder and coach.

Isnilon Totoni Hapilon, also known by the nom de guerre Abu Abdullah al-Filipini, was a Moro Islamist militant affiliated with ISIS.

Patrick Baumann was a Swiss basketball executive, player and coach. He was the President of the Global Association of International Sports Federations and Secretary General of the International Basketball Federation (FIBA). He was posthumously inducted into the Basketball Hall of Fame in 2020.

Johan Botha was a South African operatic tenor.

Ledell T. Lee was executed for the 1993 murder of his neighbor, Debra Reese. He was convicted in 1995 and the Arkansas Supreme Court affirmed the conviction in 1997, but numerous questions have been raised about the justice of his trial and post-conviction representation. Issues have included conflict of interest for the judge, inebriation of counsel, and ineffective defense counsel.

Vladimir Alexandrovich Voevodsky was a Russian-American mathematician. His work in developing a homotopy theory for algebraic varieties and formulating motivic cohomology led to the award of a Fields Medal in 2002. He is also known for the proof of the Milnor conjecture and motivic Bloch–Kato conjectures and for the univalent foundations of mathematics and homotopy type theory.

Norman Dalton Cash was an American Major League Baseball first baseman who spent almost his entire career with the Detroit Tigers. An outstanding power hitter, his 377 career home runs were the fourth most by an American League left-handed hitter when he retired, behind Babe Ruth, Ted Williams and Lou Gehrig; his 373 home runs with the Tigers rank second in franchise history behind teammate Al Kaline (399). He also led the AL in assists three times and fielding percentage twice; he ranked among the all-time leaders in assists and double plays upon his retirement, and was fifth in AL history in games at first base (1,943). He was known to fans and teammates during his playing days as "Stormin' Norman."

Isidro Baldenegro López was a farmer and community leader of Mexico's indigenous Tarahumara people in Sierra Madre and an environmental activist who fought against unregulated logging in his region.

Doroteo Gerardo N. Alanguilan, Jr., also known in the Philippines by his alias Komikero, was a Filipino comic book artist, writer, and architect from San Pablo, Laguna. He was an important figure in the Philippine comics renaissance of the 1990s and early 2000s, and is known internationally for his graphic novels Wasted and Elmer, and for his inking on American superhero comics such as Wetworks, X-Men, Superman: Birthright, Wolverine, and Fantastic Four.

Lev Yakovlevich Rokhlin was a career officer in the Soviet and Russian armies. Rokhlin reached the top of the Russian military, quickly rising through the ranks during and after the Soviet–Afghan War. He was a member of Russian State Duma and the chairman of State Duma's Defense Committee.