It exists within the hierarchy of Kshatriya -> Rajputs -> Saini -> Longia/Longiya.
Kshatriya is a warrior class, one of the highest in the caste system. One of the subcastes of Kshatriya's is Sikh Rajputs that goes down to Sikh Saini's. Longiya/Longia is a subcaste of Sikh Saini's. Although Rajputs/Sainis are considered high in statusoutside of Punjab, inside Punjab Sikh Rajputs and Sainis are equivalent to Sikh Jats - since they all come under 'Landlords'. They are also known as the 'martial race'.
Almost all Rajputs/Saini's in Punjab are Sikhs. Sikhism denies the caste system. Thus, intermarriage among Sikhs with different 'clans' (ex. Jodhas, Jats, Saini's etc. ) is common.
> "His last name is Longia."
> "Really? He must be warrior-type!"
> "What does that mean?"
> "
lon-jahy-nuhs; noun: A sexually transmitted disease communicated through fallic penetration of an open stab wound. Orignially referred specifically to the disease transmitted by sexual contact with Jesus' stab wound, the definition has since broadened to encompass contagion acquired by stab fucking anyone.