Who is the father of grammar?

There isn't one single "father of grammar" in the sense of someone who invented the concept of grammar itself. Grammar has evolved organically over centuries, with contributions from many individuals and cultures.

However, some key figures have significantly impacted the development of grammar studies:

* Pāṇini (c. 5th century BCE): An Indian grammarian who wrote the *Aṣṭādhyāyī*, a highly influential Sanskrit grammar text that laid the foundation for the study of phonetics, morphology, and syntax. He's often considered the first to systematically codify a language.

* Dionysios Thrax (c. 100 BCE): A Greek grammarian who wrote the first comprehensive Latin grammar, establishing many of the grammatical terms still used today.

* Varro (116-27 BCE): A Roman scholar who wrote extensively about language and grammar, contributing to the understanding of Latin syntax and morphology.

* Apollonius Dyscolus (c. 100-180 CE): A Greek grammarian who wrote important works on syntax and morphology, establishing a system of grammatical analysis that influenced later grammarians.

While these individuals are often highlighted, it's crucial to remember that grammar is a dynamic and ever-evolving field, with contributions from countless individuals across cultures and time periods.