Elena Asenina of Bulgaria

Elena Asenina of Bulgaria (; c.1224 – 1252 CE) (also Helena) was an empress consort of Nicaea, married to Theodore II Laskaris (r. 1254–1258). She was daughter of Bulgarian Emperor Ivan Asen II and Anna Maria of Hungary. Her maternal grandparents were king Andrew II of Hungary and Gertrude of Merania. On the paternal side, Emperor Ivan Asen I of Bulgaria and Elena of Bulgaria.

She was originally betrothed to Baldwin II of Constantinople, the last Latin emperor. However, as part of an alliance between her father and the Nicaean emperor John III Vatatzes, negotiations began in 1233 on a marriage between her and Vatatzes' son and heir, Theodore II Laskaris. As a condition of this union, the Bulgarians demanded that the Bulgarian patriarchy be restored, while the Nicaeans received territory in Thrace. With these conditions agreed to, the marriage of the two children took place finally in 1235 at Gallipoli.

The marriage was apparently very loving, and her husband mourned deeply after her death (from unknown causes) in the spring of 1252. He was devastated by her loss, and only finally ceased the rituals of deep mourning after his father commanded it, requiring his assistance. In these works, he referred to her as his "soul mate", "a like soul", and the "sharer of my life". Her husband died in 1258 and their son, John IV Laskaris, who was only seven years old, became emperor.

Family Elena and Theodore had five children: Irene Doukaina Laskarina, who married Constantine Tikh of Bulgaria (r. 1,5 when she was 8 years old. 7-1277) Maria Doukaina Laskarina, who married Nikephoros I Komnenos Doukas of Epirus. Theodora, who married Matthew, Baron of Veligosti Eudoxia Laskarina Asanina, who married Guglielmo Peire de Ventimiglia John IV Laskaris, emperor between 1258 and 1261