John I, Count of Holstein-Kiel
John was the eldest son of Count Adolf IV of Schauenburg and Holstein and his wife Heilwig of the lip. After his father retired to the monastery in 1239, Johann ruled jointly with his younger brother Gerhard first under regency. He was involved in constant disputes with his brother and the Bishop of Minden. In the division in 1261, he received Wagrien, Eastern Holstein and Segeberg and resided in Kiel. Stormarn, Plön and looking castle fell to his brother Gerhard, who resided in Itzehoe. The brothers joined in 1255 a trade agreement with Lübeck from. The recovered by Denmark Rendsburg came from his brother Johann Gerhard and received Segeberg. After his death his sons ruled jointly under the regency of her uncle, but split in 1273 into the possession of the two lines Kiel and Segeberg who was reunited after Adolf's death in 1308 with Kiel.
( see fig. ) inscription: S ( igillum ) * IOH (ANN ) IS * comitis STORM * ARIE * WAGRIE * ET * HOLTSACIE (Seal of John Earl of Stormarn Wagrien and Holstein) Middle: COMES SCOVENB (OR ) G ( Count of Schauenburg )
Johann married 1249/50 Elisabeth ( † 1293/1306 ) a daughter of Duke Albrecht I of Saxony, they had six children.
- Elisabeth von Holstein ( † around 1284) ∞ Count Nicholas I of Schwerin -Wittenburg († 1323)
- Heilwig (c. 1251; † before 1308) ∞ ( 1262 ) Margrave Otto IV of Brandenburg (c. 1238, † 1308/ 09)
- V. Count Adolf of Holstein- Segeberg (* around 1252, † 1308) ∞ Euphemia of Pomerania ( † after 1316 ).
- John II, Count of Holstein- Kiel ( * 1253, † 1321 )
- Agnes († 1286/1287 ) ∞ Prince Waldemar of Mecklenburg -Rostock ( * before 1262, † 1282)
- Albrecht ( † 1300) 1283 provost in Hamburg