Why is it called Gantt?

The Gantt chart is named after Henry Laurence Gantt, an American engineer and project management consultant who developed the chart in the early 20th century.

Gantt devised his version of the chart in the 1910s, which became widely known and popular in Western countries. While the concept of a chart showing activities against time was first developed around the turn of the 19th century by Polish engineer Karol Adamiecki, it was Gantt whose name became associated with charts of this type.

Henry Gantt popularized the method in the West, publishing articles on it in 1910 and 1915. He is considered the inventor of the Gantt chart, hence the name. Gantt charts are now one of the most popular and useful ways of showing activities (tasks or events) displayed against time in project management