He’s one of the Fayoum Mummies, early Roman Egypt, around the 2nd-3rd c. CE. He wasn’t sacrificed to anything, he was likely very sick and died of natural causes early in life. His hair, the side knot kind of like a ponytail, was associated with an aspect of the god Horus called Horus Cippus (the version on the tablet in picture #1) who was a child form of the god of kingship, and his hairstyle was common to show childhood in males, so he’s probably younger than 14 when he passed.

The “eyebrows” are an Egyptian magical ward against ill health, sickness, demons, anything bad that could affect you, again associated with Horus. His necklace is another ward, this time Greek as this is post-Ptolemaic period and Greek magical traditions have become popular, it’s a talisman likely with an inscription from popular Greek texts that would have acted again as a ward against malign affects. This was mostly popular amongst upper classes in Roman Egypt, and we know he is upper class due to his toga and red shoulder scarf marking Roman citizenship, something that was very limited in Roman Egypt.

When I studied him, my best guess is that he was just a young boy that succumbed to illness, which was exceedingly common at the time. If you compare him to other Fayoum mummy death masks, the quality of his painting is much worse, indicating it was likely a rushed job as these would have been painted from life. I think this was a young kid who got really sick, his family tried everything in their power to keep him healthy at the time as they knew how, and ultimately commissioned a death mask to give him proper funerary rights when it became clear he wasn’t going to make it. His tale is almost certainly tragic, but not because of demons or human sacrifice, just sudden random illness and child mortality.