I have published articles on Brahmin Kshatriya and Vaisya Gotras and a detailed list of Brahmin Gotras.
There have been a lot of queries on Gotras.
Broadly speaking they are of two types.

One informing me that I have left out a Gotra.
As Gotra information is difficult to come by and has to be validated I include the Gotras I missed out provided they stand verification.
There are a lot of Gotras which are not known because Brahmins have dispersed throughout India and have different mother tongues.
I shall be writing on these missed out/rare Gotras shortly after researching into various issues.
The other type of query is as to how one finds his Gotra.
The procedure is as follows.
Find out the Traya Rishis, the three Rishis mentioned in the Pravara.
That is the names of the three/five Rishis in the Abhivadana Mantra,
For example Abhivadaye
Kasyapa Apastara Naithruva
Thraya Rishe
Here the three Rishis are Kasyapa Apastara and Naithruva.
Your Gotra is the one that of the first Rishi
Here it is Kasyapa.
This method is for peoplevwho know Abhivadana but can not name their Gotras(some can not find Gotra even if they know Abhivadana)
For others check from the elders of the family the Sankalpa they perform during pooja orapara kriyas.
From this you can find the three or five Rishis.
If you can not find here or do not know Sankalpa findout the Veda shaka you follow.
If you can not find this find out the names of your paternal grandfather ,great grandfather and let me know the details along with the names of your father,Family Deity and your mother tongue.
I shall try to find out the Gotra.

Hello sir My Name is Nikhil Mamdapure
Father : Vijaykumar Mamdapure
Grand father: Sidramappa Mamdapure
Great Grand Father : Gadigeppa Mamdapure
Great Great Grand Father : Sangappa Mamdapure
Mother Tongue : Kannada Marathi
Caste : Simpi
Place : Karnataka(specifically north karnataka),& Maharashtra
Family Deity: Male Deity – Diggi Sangameshwar (karnataka)
Female deity – Banashankari (karnataka)
plz tell me the gotra
Shiva Gotra
Hi Sir,
I have few doubts regarding conversion and their gotras and whether it is possible. Would you please provide me your email address or reply to my email so that I can explain it in detail. I would like to keep it private as it is personal.
Thanks in advance!
ramanan50@gmail.com.
My name is:Phubes Jay sneberger
Father name is:wiriya apaiwong
Grand father name:siripong apaiwong
Grand mother:rampai apaiwong
Language:Thai,english,hindi
Place:Thailand
Family deity:Gautama Buddha,Durga,Ganesh
It is difficult to find for those Hindus who are abroad
If you can recall or get some information on any reference to the specific Veda in your family functions? I can try with that.Regards.
My name is Tapan Patel, Father’s name is Thakorbhai Patel. Grandfather’s name is Gordhanbhai Patel . My paternal great grand parents are from village Bhadran, Gujarat. Please let me know my Gothra. Please email my Gothra to pv1106@gmail.com
Thank you
Name of Family Deity?
Dear Sir,
I am karthik from coimbatore, i have to know my gotra i given details below
Can you please send my gotra to mail karthi08pi09@gmail.com
My Name: Karthikeyan
Father’e Name: Nagappan
Grandfather: Nanjan
Great Grandfather: Madhavan
Ancestral place: Coimbatore
Family Goddess: Kondathaai (Parvathi)
Vishnu Gotra