His name was Osirus,.. She was very close to him.
She married Osirus who was her brother & Seth also Isis's and Osirus's Brother. Seth was very annoyed that Osirus married Isis. Osirus was in a feud with Seth. Seth was angry and wanted revenge.
Seth killed Osirus by drowning him in the Nile. But later Isis brought him bavk to life using her powers. Seth was very angry especially when he found out that Osirus was still alive.
So he killed him again in a way that not even Isis could bring him back. Or so he thought.
Seth divided his body into seventeen parts and spread them across the Nile.
Isis searched for day and night & eventually she found all the parts and brought him back again. {AGAIN!!} At this time it was seen and believed that Isis was pregnant although that was a subject of much Debait.
What ever happend Isis gave birth to Horus. {the god of law, war, young men, light, the sun, many others.}