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Old Norse heilagr
← Old English hāliġ (cognate)
← Proto-Germanic *hailagaz (inherited)
← Old High German heilag (cognate)
← Gothic 𐌷𐌰𐌹𐌻𐌰𐌲𐍃 (cognate)
← Old Norse heill (affix)
← Old Norse -agr (affix)
← Old Frisian hēlich (cognate)
← Old Saxon hēlag (cognate)

→ English Olga (derived)
→ Old English halig (cognate)
→ Belarusian Вольга (mention)
→ Danish hellig (inherited)
→ Faroese heilagur (inherited)
→ Old Swedish helagher (inherited)
→ Old High German heilag (mention)
→ Icelandic heilagur (inherited)
→ Norwegian Bokmål hellig (derived)
→ Norwegian Nynorsk heilag (inherited)
→ Old Norse helgi (suffix)
→ Old Norse Helgi (mention)
→ Old Norse ginnheilagr (compound)
→ Old Norse allraheilagramessa (affix)
→ Old Norse heilagleikr (suffix)
→ Old Norse sannheilagr (affix)
→ Old Norse úheilagr (affix)
→ Old Saxon helag (cognate)
→ Polish Olga (derived)
→ Russian Ольга (mention)
→ Swedish helig (inherited)