I had no idea what Jatt last names are. But out of curiosity I looked it up. Here are the M last names.
M: Mader, Magsi, Mahad, Mahal, Mahil, Mahani, Mahir, Mahara, Maharana, Mahe, Mahesar, Mahi, Mahli or Malhi, Mahota, Mahra, Mahtarmalhi, Makol, Makoma, Mal, Malan, Malana, Malanhans, Malhah, Malhi, Mallhi, Malli, Mamar, Mamarha, Mamra, Mamrai, Mann, Mand, Mang, Mangan, Mangat, Mangath, Markanda, Markha, Marrar. Marula, Maryal,
Masan, Maswan, Mat, Matu, Mavi, Megal, Megla, Mekan, Menas, Meri, Mermalha, Mesar, Metla, Miana, Mitru, Mochani, Mochhar, Mohal, Mond, Mondah, Mondi, Month, Mor, Moran, Morare, Motha, Mula, Mundtor.
I still don't know what Jatt last names are....So I looked it up and got:
"The Jat people (IAST: Jāṭ, Hindi: जाट, Punjabi: ਜੱਟ جٹ Jatt, Urdu: جاٹ), are an ethnic group of people[2][3] native to mainly the Punjab region[4] of Northern India and Pakistan that have attributes of an ethnic group, tribe and a people.[5][6]
The Jat people are considered by some to be the merged descendants of the original Indo-Aryans and a later addition of Indo-Scythian tribes of the region, merging to form the Jat people"