Those not having Father must perform.

Such Tharpanam - Pithru (Father) vargam will comprise of six persons; if Mathamaha (Mother Lineage) is still alive, then no need to perform Tharpanam for that lineage.

S. No.	Male Lineage	S. No.	Female Lineage
1.	Pitha - Father	4.	Matha - Mother
2.	Pithamahan - Grand Father	5.	Pithamahi - Grand Mother
3.	Prapithamahan - Grand Father’s Father	6.	Prapithamahi - Grand Mother’s Mother

S. No.	Male Lineage	S. No.	Female Lineage
7.	Mathamahan - Mother’s Father	10.	Mathamahi - Mother’s Mother
8.	Mathu - Pithamahan = Mother’s Grand Faher	11.	Mathuhu Pithamahi = Mother’s Grand Mother
9.	Mathu - Prapithamahan = Mother’s Grand Father’s Father	12.	Mathu - Prapithamahi = Mother’s Grand Mother’s Mother

If all the 12 persons are no more, then performing Tharpanam for all the 12 is MUST. If anyone is still living, then one more person to be added from the previous lineage.

For example: If in pithruvargam, grand father is alive, then the sequence will be Pithru (father), Pithu:prapimamahar (grand father's father), Pithu:prapimamahar (grand father's grand father) to be performed.

Likewise if mother is alive, Pithamhi, prapithamahi, pithu prapithamahi - to be performed.

If mother is not alive (pithamahi), matha, prapithamahi, pithu prapithamahi - to be performed.

Similarly, before beginning the Tharpanana mantram, remember clearly the name, gothram or keep it handy (refer to chart below) and then begin Tharpana Please keep the following chart handy, write down Gothras, Names of 3 generations and it will be useful :-

S. No.	Gotharam	Sharma Nama	Roopam	Pithru
1.			Vasu	Pitha
2.			Rudra	Pithamahan
3.			Aditya	Prapithamahan

S. No.	Gotharam	Sharma Nama	Roopam	Pithru
1.			Vasu	Matha Maha
2.			Rudra	Matha Maha
3.			Aditya	Matha Maha

S. No.	Gotharam	Sharma Nama	Roopam	Pithru
1.			Vasu	Pitha Maha
2.			Rudra	Pitha Maha
3.			Aditya	Pitha Maha

S. No.	Gotharam	Sharma Nama	Roopam	Pithru
1.			Vasu	Matha Maha
2.			Rudra	Matha Maha
3.			Aditya	Matha Maha

Everyone has responsibility to discharge duties and one among them is "Pithru karma".  We are required to perform Shraarddha Karmas (pithru karma) after the passing away of Parents.  Failure to perform the enshrined duties, such as this one, will earn the wrath of Pithrus (departed souls)and ultimately cursed by them.  "Pithru tharpanam" means "to satisfy our departed souls of forefathers"

Here Pithrus are those passed away and referred to as "pithru vargam", Mathamaha vargam" respectively. Should anyone wants peace, wealth and good health for seven generations - they should perform pithru karmas without interruption.  Failing to execute these karmas or performing without much interest but as a routine, will not keep the Pithrus happy.  Therefore, we request everyone to do it according to laid down procedures and Shraddha (concentration).

Besides these two pithrukarmas (each year shraardham), doing Amavasyay tharpanam, mahalaya paksham, Masa Sangramanams, eclipse (sun & moon), are important.