Yes ,it is jat surname if he/she belongs to ludhiana.
yes
Yes,Thandi is Jatt Sikh, but Thind is Kamboj
yes
Yes. Pannu is a Punjabi Sikh Jatt name.
yes mehat r jatt sikh ..and they live in mehtan near phagwara
yes!
Lotey is ramgarhia
Yes. Nijjar is jatt Sikh name
yes, purba s are jatt . they are from kamboj community... and kamboj are jatt thind ............. kamboj like Sardar Bhagat Singh & Shaheed udham Singh ARE kamboj and they said to be jatt........... I just wanna interrupt you my dear friend ,as you seem to b little bit ignorant in term of history yes indeed you were right in case of Shaheed udham singh ,that he was a Kamboj Sikh butt he was not from Jatt clan, & shaheed bhagat singh was from jatt clan Sandhu. & kamboj are not Jatt ....ok morever don't compare them with Thind Jatt clan its meaningless.
No Julka is not Jatt. They are Khatri sikh.
Yes
They can be Jatt or Rajput depending on their background.
Yes 100% jatt panjabi