<P> People belonging to several other castes and communities have also used Singh as a title, middle name or a surname; these include non-Sikh Punjabis, Gujjars (e.g. Nirbhay Singh Gujjar), Marathas (e.g. Pratap Singh Rao Gaekwad) and Hindu Jats (e.g. Bhim Singh Rana) The surname' Singh' is used by many caste groups in Bihar . The name is also found among the Indian diaspora . For example, taking advantage of the fact that there was no reliable way to ascertain a person's caste, some of the low - caste Indian indentured labourers brought to British Guiana adopted the surname "Singh", claiming to be high - caste Kshatriyas . </P> <P> Singh is generally used as a surname (e.g. Manmohan Singh) or as a middle name / title (e.g. Mahendra Singh Dhoni). When used as a middle name, it is generally followed by the caste, clan or family name . To avoid being identified by their castes or clans, several Sikhs append "Khalsa" to Singh (e.g. Harinder Singh Khalsa). Some Sikhs add the names of their native villages instead (e.g. Harcharan Singh Longowal, after Longowal). </P> <P> Originally, a common practice among the Rajput men was to have Singh as their last name, while Rajput women had the last name' Kanwar' . However, now, many Rajput women have Singh in their name as well . </P> <P> A section of around a million adherents of Sikhism that live abroad in Western countries only keep Singh or Kaur as their last name . This has caused legal problems in immigration procedures, especially in Canada . For a decade, the Canadian High Commission in New Delhi stated in letters to its Sikh clients that "the names Kaur and Singh do not qualify for the purpose of immigration to Canada", requiring people with these surnames to adopt new ones . The ban was denounced by the Sikh community, after which the Citizenship and Immigration Canada announced it was dropping the policy, calling the whole issue a misunderstanding based on a "poorly worded" letter . </P>

Singh surname belongs to which caste in bihar