What is "sadequain"

Syed Sadequain Ahmed Naqvi , Tamgha-e-Imtiaz, Pride of Performance, Sitara-e-Imtiaz, also often referred to as Sadequain Naqqash, was a world-renowned Pakistani artist, best known for his skills as a calligrapher and a painter. He is considered as one of the finest painters and calligraphers Pakistan has ever produced.