↑ 1.01.1Scanned Norwegian Church records at Digitalarkivet. Solum parish, Telemark. SAKO/A-306/F/Fa/L0004: Parish register (official) no. I 4, 1814-1833. Births and Christenings page 79. Født 1 Nov 1823, døpt 30 Nov 1823: Isak, foreldre Mads Olsen og Guri Olsdatter Bolvigeiet. Faddere: Marte Olsdatter Bolvigeiet, Maria Knudsdatter Bolvigeiet, Anders Olsen Bolvigeiet, Svend Tollevsen Vold, Erik Grødevig.
↑Scanned Norwegian Church records at Digitalarkivet. Solum parish, Telemark. SAKO/A-306/F/Fa/L0005: Parish register (official) no. I 5, 1833-1843. Confirmations page 176. 7 Apr 1839 6. Isak Madsen Klevene under Bolvig, d. 30 Nov 1823 Klevene, foreldre Mads Olsen og Guri Olsdatter.
↑Scanned Norwegian Church records at Digitalarkivet. Solum parish, Telemark. SAKO/A-306/F/Fa/L0006: Parish register (official) no. I 6, 1844-1855. Weddings page 336. 28. 25 Oct 1852 Solum: Ungkarl Isak Madsen f. Klevene, oph. Wold 28 aar Fader Mads Olsen, pige Aaste Marie Pedersdatter f. Eidanger, oph. Bolvik 24 aar Fader Peder Hansen. Forlovere Ole Johnsen Wold og Hans Pedersen Bolvig.