Buddha: https://en.wikipedia.org/wiki/Gautama_Buddha
"Legend has it that, on the night Siddhartha was conceived, Queen Maya dreamt that a white elephant with six white tusks entered her right side,[93][94] and ten months later[95] Siddhartha was born...
The infant was given the name Siddhartha (Pāli: Siddhattha), meaning "he who achieves his aim". During the birth celebrations, the hermit seer Asita journeyed from his mountain abode and announced that the child would either become a great king (chakravartin) or a great sadhu."
Krishna: https://en.wikipedia.org/wiki/Krishna
"In Krishna Charitas, Krishna is born to Devaki and her husband, King Vasudeva of the Yadava clan in Mathura.[88] Devaki's brother is a tyrant named Kansa. At Devaki's wedding, according to Puranic legends, Kansa is told by fortune tellers that a child of Devaki would kill him. Kansa arranges to kill all of Devaki's children."
Perseus: https://en.wikipedia.org/wiki/Perseus
"Perseus was the son of Zeus and Danaë, the daughter of Acrisius, King of Argos. Disappointed by his lack of luck in having a son, Acrisius consulted the oracle at Delphi, who warned him that he would one day be killed by his daughter's son. In order to keep Danaë childless, Acrisius imprisoned her in a bronze chamber, open to the sky, in the courtyard of his palace:[5] This mytheme is also connected to Ares, Oenopion, Eurystheus, and others. Zeus came to her in the form of a shower of gold, and impregnated her.[6] Soon after, their child was born; Perseus—"Perseus Eurymedon,[7] for his mother gave him this name as well" (Apollonius of Rhodes, Argonautica IV)."
Alexander the Great, maybe: https://en.wikipedia.org/wiki/Alexander_the_Great
"Several legends surround Alexander's birth and childhood.[12] According to the ancient Greek biographer Plutarch, on the eve of the consummation of her marriage to Philip, Olympias dreamed that her womb was struck by a thunder bolt that caused a flame to spread "far and wide" before dying away. Sometime after the wedding, Philip is said to have seen himself, in a dream, securing his wife's womb with a seal engraved with a lion's image.[13] Plutarch offered a variety of interpretations of these dreams: that Olympias was pregnant before her marriage, indicated by the sealing of her womb; or that Alexander's father was Zeus. Ancient commentators were divided about whether the ambitious Olympias promulgated the story of Alexander's divine parentage, variously claiming that she had told Alexander, or that she dismissed the suggestion as impious."