See also
| Husband: | Frederick (c. 1135-1189) | |
| Wife: | Elisabeth of HUNGARY (c. 1140- ) | |
| Children: | Helena of BOHEMIA (1158- ) | |
| Sophia of BOHEMIA (c. 1160-1185) | ||
| Vratislaus (c. 1162-1180) | ||
| Olga (c. 1164-1163) | ||
| Margaret (c. 1166-1167) | ||
| Ludmilla of BOHEMIA (1170-1240) | ||
| Name: | Frederick | |
| Sex: | Male | |
| Father: | Vladislaus II (1110-1174) | |
| Mother: | Gertrude of BABENBERG (c. 1115- ) | |
| Birth | 1135 (est) | |
| Occupation | Duke of Bohemia | |
| Title | frm 1164 (age 28-29) | Duke of Olomouc |
| Title | frm 1172 to 1173 (age 36-38) | Duke of Bohemia |
| Title | frm 1178 to 1189 (age 42-54) | Duke of Bohemia |
| Death | 25 Mar 1189 (age 53-54) | |
| Name: | Elisabeth of HUNGARY | |
| Sex: | Female | |
| Father: | Geza II + (1130-1162) | |
| Mother: | Euphrosyne + of KIEV (1130-1193) | |
| Birth | 1140 (est) | |
| Name: | Helena of BOHEMIA | |
| Sex: | Female | |
| Birth | 1158 | |
| Name: | Sophia of BOHEMIA | |
| Sex: | Female | |
| Birth | 1160 (est) | |
| Death | 25 May 1185 (age 24-25) | |
| Name: | Vratislaus | |
| Sex: | Male | |
| Birth | 1162 (est) | |
| Death | 1180 (age 17-18) | |
| Name: | Olga | |
| Sex: | Female | |
| Death | 1163 (age -2--1) | |
| Birth | 1164 (est) | |
| Name: | Margaret | |
| Sex: | Female | |
| Birth | 1166 (est) | |
| Death | 28 Aug 1167 (age 0-1) | |
| Name: | Ludmilla of BOHEMIA | |
| Sex: | Female | |
| Spouse 1: | Adalbert III (1161-1197) | |
| Spouse 2: | Louis I (1173-1231) | |
| Birth | 1170 | Praha, Czechoslovakia |
| Occupation | Duchess Consort of Bavaria | |
| Title | Countess Consort of Bogen | |
| Title | frm 1204 to 1231 (age 33-61) | Duchess of Bavaria |
| Death | 14 Aug 1240 (age 69-70) | Seligenthal Convent |
| Burial | Seligenthal Convent | |
Frederick (Czech: Bedrich) (died 25 March 1189) was the duke of Olomouc from 1164 and then duke of Bohemia from 1172 to 1173 and again from 1178 to his death. He was the son of King Ladislaus II, who abdicated in 1172 in his favour. However, he could not hold on to his principality, because he was approved of by neither the national diet nor the emperor, and was deposed in September the year following by the emperor at the Diet of Hermsdorf. The Emperor Frederick I, godfather and namesake of Frederick, nominated Oldrich, son of Sobeslaus I, but he renounced the throne in favour of Sobeslaus II, friend of peasants, but enemy of both nobles and emperor.
Frederick allied with the emperor and defeated Sobeslav at the battles of Lodenice and Prague. The emperor recognised Frederick as an imperial prince, but he also raised the bishop of Prague, Henry Bretislaus, to princely status, making him a direct vassal of the emperor. He also appointed Conrad Otto margrave over Moravia and thus divided the duchy into three parts dependent on him. When Frederick, who was practically a puppet of the emperor, died, he was succeeded by Conrad Otto.
By his marriage to Elizabeth, daughter of Géza II of Hungary, he had the following issue:
Helena (b.1158), affianced to Peter, son of Manuel I Comnenus, in 1164
Sophia (died 25 May 1185), married Albert I, Margrave of Meissen
Ludmilla (died 14 August 1240), married Adalbert VI, count of Bogen, and then Louis I, Duke of Bavaria
Vratislaus (d.1180)
Olga (fl.c.1163)
Margaret (died 28 August 1167)