Ancestral and self property

Your grandfather's property is not ancestral property. 

It becomes your father's self acquired property. 

If there was a registered partition deed then it cannot be challenged at this stage neither your siblings can claim any share in the property as a right. 

3 acres of land from your grandfather to your father, is this only from your grandfather or ancestors? If the 3 acres of land from your grandfather and 3 acres of land purchased by your father total extent of 6 acres will be treated as your father's property.   You have obtained 5 acres of land through a partition deed, but no one claims it.

None of the properties are ancestral.

Partition has to be between your father and all siblings, otherwise it is liable to be set aside even if it is registered.

Dear Vashista sir

you are saying partition has to be between my father and all siblings, siblings means whose sibling, is my father or my sibling pls give suggestion.

Your siblings..........................................................

Dear sir

 partition deed was happened between my self and my father, no one is party of the partition. 

There's no infirmity in this.

After acquiring the property from his father your father becomes absolute owner of the property hence he can transfer property to you by a registered partition deed by retaining some of them.

Your siblings case seeking share in the property is not maintainable as per law 

Dear Ms. Madhu,

The siblings of author / concerned person and his / her father who is stated to have purchased / acquired subject property.

Dear sir

one more point in this, my father taken one acer land to his name and matter written in partition deed it was after my father this one acer land goes to grandchildrens, who is grand childrens here, only my childrens or including daughters childrens . pls explain

Thank you

The deed that has been executed is a settlement deed. The property settled in your favour belongs to you. The remaining property (1 acre) is to be settled in accordance with the citations in the deed. 

Dear sir

Which means remaining property goes to all grand childrens( including daughters childrens or sons childrens) pls explain in detail. 

Thank you

Any further and proper opinion will depend on the scrutiny of the relevant documents otherwise this thread will keep stretching with improper guidance or opinion hence you may consult an advocate having expertise in the field on all such further issues.

I endorse the advise of expert Mr. T Kalaiselvan ji, show relevant documents to a local prudent lawyer for proper appreciation and professional advise, which may differ with the experts on this platform based on limited facts posted.

Dear sirs

Appreciate  your reply for my questions.

Thanks lot to everyone