Yaakov Yeshayah Blau (1929–2013) was a rabbi and a dayan on the Badatz of the Edah HaChareidis in Jerusalem. He was known as an expert in the halakhot of Choshen Mishpat and served as halakhic decisor for over 50 years.
Milton Eric Blau (June 1, 1921 – February 17, 2009) was an author and is best known as the creator of the Off Broadway show Jacques Brel is Alive and Well and Living in Paris.