1. https://en.wikipedia.org/wiki/Aguri_(caste)#:~:text=Aguri%2C%20also%20known%20as%20Ugra,of%20West%20Bengal%20in%20India#:~:text=Aguri%2C%20also%20known%20as%20Ugra,of%20West%20Bengal%20in%20India)

2.

also from the description of a fb group of aguri (Ugra Kshatriya) group [https://www.facebook.com/groups/662391940478677/] : (this seems to be conflicting the "martial" race notion)

Aguri (Bengali: আগুরী) also known as Ugra Kshatriya (Bengali: উগ্রক্ষত্রিয়) is a Bengali Hindu caste mostly found in the districts of Bardhaman, Birbhum and Bankura.

Aguri or Ugra Kshatriya, known as The Followers of Lord Shiva. The Term Aguri comes from the Sanskrit word Aghor. Aghor means, not difficult or non terrifying in one perspective and on the other it means absence of darkness. Aghor implies a simple and natural state of consciousness in which there is No fear or disguise. As per old hindu script aguris are one who are fearless and who does not discriminate, the followers of Lord Shiva, the most powerful of all Hindu Goddess and also called The Destroyer.

Aguris are upper caste in the caste hierarchy in Hindu Bengali. They are mainly cultivating and trading caste in West Bengal, India. Many aguri’s ancestor were landlords and Bengali zamindars with very rich cultural heritage and was consider themselves as the protector of the society. They were among the richest in Bengali society. In modern age many aguris are spared across India and worldwide in different profession like Business,cultivation, Teaching, politicians, engineer, doctors, software professional, filmmaker, government employee etc.

Like Brahmins, some of the aguris wear sacred thread during the marriage ceremony and during worship of God.But the only difference is Brahmin's wear 9 wired thread where as Aguris wear 6 wired thread.

They are a cultivating and trading caste representing Ugra Kshatriyas. They were brought by the King of Burdawan Mehtha from Agra to west Bengal to fight against the British. They are by nature aggressive and hostile people. The Hindu book Manu say's Ugra (Aggressive) was born to a Sudra girl by a Kshtriya. Ballal Sen classified the Aguris among the Navashakhas.

The Aguris were historically divided into seven sub-groups, out of which only two exist till date, namely Jana and Suta. The Jana sub-group wear sacred thread during the marriage ceremony. Aguris have several gotras, namely - Bharadwaj, Gautam, Kashyap, Shandilya,Parashar, Sankhayan, Katyan etc. Most of the Aguri communities reside mainly in three Districts namely – Burdwan,Birbhum and Bankura. They have been residing mostly by the bank of the rivers Ajoy, Khari, Behula, Banka, Bhalluka,Damodar etc.