Ellef Bjørnsen Osen

1701 Manntall (Ellef is claimed to be 26 years old at the time):
RA, Manntallet 1701, nr. 4: Jæren og Dalane fogderi, 1701, s. 86-87. https://www.digitalarkivet.no/ft10041010271057

Skoskatten 1711 (Ellef and Inger/Ingrid are listed with one child (Bjørn Ellefsen) :
Rentekammeret inntil 1814, Reviderte regnskaper, Fogderegnskap, RA/EA-4092/R46/L2735: Fogderegnskap Jæren og Dalane, 1711, s. 446. https://www.digitalarkivet.no/rk10081305100454

Probate record (09-02-1742; Ellef was dead at the time and his heirs were listed as his widow Ingrid, and 6 living children: Bjørn Ellefsen (married and living at Sokndal, but now to move back to Osen), Nils Ellefsen (soldier and 'myndig'), Anna d.e. Ellefsdatter (married to Brynild Asbjørnsen Moi), Anna d.y. Ellefsdatter (23 years old, living at Osen), Todni Ellefsdatter (17 years old, living at Osen), and Ingrid Ellefsdatter (14 years old)):
Jæren og Dalane sorenskriveri, SAST/A-100306/5/50BA/L0008B: SKIFTEPROTOKOLL <349-758>, 1741-1744, s. 415b-416a. https://www.digitalarkivet.no/sk20081106690674

Probate record of his mother (26-09-1684; the heirs were her widower Bjørn, and 6 children: Ole, Bjørn, Håver, Ellef, Besse and Gunvor):
Jæren og Dalane sorenskriveri, SAST/A-100306/5/50BA/L0002: SKIFTEPROTOKOLL. https://www.digitalarkivet.no/sk20081106650550

"Heskestad sokn gard, ætt og folk" (pp.476-477).
"Lunds historie" (p.417).