Hanumaan is what we should use. Hanu means Jaw. Hanumaan = Hanu + Mat Mat is a pratyaya (Suffix like) which denotes possession. Hanumat means one with a special Jaw. • Buddhimat means one with intelligence • Shaktimat means one with strength Hanumat, buddhimat, shaktimat are all stem words When we use mat to represent a male it becomes maan. When used to represent a female it becomes the fininine nominative mati. • Buddhimaan – Masculine nominative • buddhimaati – Feminine nominative • Indumaati – Feminine nominative (one with Moon like beauty) • Bhanumaati – Feminine nominative (one shining like Sun) • Shriman - The one with Shree (masculine nomanitive) • Shrimati - The one with Shree (femine nominative) Hanumaan represents the Male form of the one with a special Jaw. When you say Hanumaat you are actually using the neuter gender form of the word. It is not appropriate to use it in such a way. The only case where you can use hanumaat is when you are using conjoined words (samasta padam). HanumaatSishya - means sishya of hanumaan - here you should not it as HanumaanSishya. Samasa’s always use the root word. The only case where you can use hanumaat is when you are using conjoined words (samasta padam). HanumaatSishya - means sishya of hanumaan - here you should not it as HanumaanSishya. Samasa’s always use the root word. The pratyaya mat will become vat if added to a word ending with “a”. • Atmavaan - One with “Atmaa”. • krupaavaan - One with “krupaa” (Mercy)