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Son of Bernhard Jonassen and Gundine Jonassen Brother of Edvin Julian Jonassen; Anton Jonassen; Bertin Gustav Jonassen; Berntine Pauline Jonassen; Charlotte Alfrida Østensen and 6 others; Grete Oline Jonassen; Astrid Theodora Nyheim; Gullbjørn Jonassen; håkon (bror tll Gullbjørn- døde i snøras); hermann Jonassen and Bernhard Jonassen « less