Children of Harald I Blaatand are:
| || i.||Erik Hring HARALDSEN was born Bef 930 in Danmark, and died Abt 950 in England.|
|1.|| ii.||Gunhild HARALDSDATTER was born Bef 945 in Danmark, and died 13 Nov 1002 in Devonshire, England. She married Palnig TOKESEN, son of Toke GORMSEN.
He was born Bef 940 in Danmark, and died 13 Nov 1002 in Devonshire, England.
| || iii.||Thyra HARALDSDATTER was born Abt 955 in Danmark, and died 18 Sep 1000 in Norge. She married Olav I TRYGVESEN 998 in Tønsberg, Vestfold County, Norge, son of Trygve OLAVSEN and Astrid EIRIKSDATTER.
He was born Abt 968 in Norge, and died 9 Sep 1000 in Died In The Sea Battle Of Svold.
She married Styrbjörn Den Starka Abt 975, son of Olof I Björnsson RING.
He was born Bef 950 in Sverige, and died 985 in Fyrisvall, Upsala, Sverige.
She married Boleslaw I Chrobry Abt 985, son of Mieszko I and Dubrawka.
He was born 966 in Greater Poland (Poland), and died 17 Jun 1025 in Poland.
| || iv.||Svend I Tveskæg was born Abt 960 in Danmark, and died 3 Feb 1014 in Gainsborough, Lincolnshire, England. He married Sigrid Storraada Abt 995, daughter of Toste.
She was born Bef 965 in Götaland Region, Sverige, and died Abt 1000 in Roskilde, Sjælland, Danmark.
He married Gunhild Abt 985, daughter of Mieszko I and Dubrawka.
She was born Abt 965 in Greater Poland (Poland), and died Aft 1014 in Danmark.
| || v.||Hakon HARALDSEN was born Bef 961 in Danmark, and died Abt 987.|
| || vi.||Mo HARALDSDATTER was born Bef 970 in Danmark, and died 1015 in Danmark.|
| || vii.||Thorgny HARALDSDATTER was born Bef 970 in Danmark, and died Unknown.|