It is quite natural that individuals might count different generations to their clam partriach .That has to do with factors like early marriage,livestock wealth and family traditions which emphasise on massive breeding .I fully understand your point from that end but in my abtirsi comparison ,I go for the largest sections and sub sections of every clan .For instance :
Xirsi Cisman,Ree Caynashe,Sugulle,Diiriye,Ree Amaan(Iidor ,HY)
Ree Cigale ,Faarax Shirwac,Mahad,Aadan, Ree Warsame (MJ,CumarM)
Ree Warfaa ,Ree Magan ,Dalal,Xirsidalal,Ree Yuusuf
Faarax Ugaas ,Ree Diini,Ree Dalal,Allamagan,Ree Cabdille
Guleed A'magan,FiqiCigaal,Ree Jiisow,Cumar Jiisow,Ree Warfaa
You may keenly observe the comparative abtirsi of some men who lived in the era of Sayyid Maxamd
1.Cumar Ugaas (Maalingur,Samatar Guleed) (OG)
2.Wardhere Shiil (Ree Diini,Ree Dalal)(MRX)
3.Maxamad Xasan (Ree Doolaal,Ree Cukur) (OG)
4.Takar Jaamac (Ree Cigalle ,Ree Mahad) (MJ)
5.Haybe Xuseen (Ree Warfaa,Ree Dalal) (OG)
6.Seed Cawad (Ree Daahir,Ree Yuusuf) (IIDOOR)
7.Nuur Dhaqane ( Faarax Samatar,Ree Geedi Faahiye ) (OG)
8.Dhunkaal Axmadyare (Biciide,Axmad Faarax)(IIDOOR)
9.Ismaaciil Jiciir (Guleed Allamagan,Ree Jiisow) OG
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8.Xirsi..........Guleed......Jiciir...Cigalle
7.Samatar..Faarax.....Doolaal.Shirwa
6.Guleed......Diini........Khalaf..Faarx
5.Samatar...Dalal.......Cukur..Mahad
4.Faarax...A'magan..Liibaan..Aadan
3.Warfaa..Cabdille...Geedi..Warsame
2.Xuseen...Shiil... ..Xasan...Jaama
1.Cumar..Wardhere...Maxmd..Takar
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8.Xirsi......8.Daahir.....Samatar
7.Warfaa.....7.Cumar....Faarax
6.Magan....6.Ismaaciil...Faahiye
5.Dalal.......5.Yuusuf...Geedi
4.Xirsi........4.Muuse.....Cali
3.Yuusuf...3.Sardheeye...Abokor
2.Xuseen...2.Cawad....Dhaqane
1.Haybe ....1.Seed.......Nuur
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8.Biciide .........8.Adan.......Allamagan
7.Faarax ..........7.Dhamal...Guleed
6.Axmad...........6.Ciise ......Fiqicigaal
5.Cali-yare .......5.Cabdi.....Jiisoow
4.Muuse...........4.Guleed...Liibaan
3.Cali................3.Rooble...Maxamad
2.Axmadyare...2.Xasan.....Jiciir
1.Dhunkaal ....1.Xuseen....Ismaacil
8.Cisman.........Guleed
7.Xirsi...............Faarax
6.Caynaashe....Diini
5.Sugulle..........Kooshin
4.Diiriye............Xasan
3.Amaan..........Jaamac
2.Xirsi................Barre
1.Madar ........ ..Siyaad
N/B.Maxamad Siyaad Barre was born in 1919 .So, his father belonged to the 1870s -1890s generation.