In Ireland, there was 2 tribes: The tribe of gods who protected Ireland from the evil gods who came from over seas to raid and kill, they were seen as pirates. But I will return to this. The evil gods were called Fomorians. Now the king of the Fomorians was Balor of the evil eye who was a wicked man who one day over heard a Druid mention a prophecy that one day the grandsons of Balor would rise up and kill him.
Thus, Balor took his daughter and locked her in a tower off the coast of Ireland that was made of glass and hired 12 female bodyguards to guard and teach her lessons. His daughter was Eithne.
Eithne would often look out to sea and wish to escape. One day, 2 women showed up on the island seeking help the guards went to them and one of the women revealed themselves to be the Druid who made the prediction and used magic to put them to sleep while the other woman removed her disguise and was revealed to be a man named Cian.
Cian came to the tower in revenge as Balor stole his magical cow. Cian is a celestial being closely connected to wind and calm seas. They came to the tower and that’s when Cian met Eithne, they fell in love and had 3 sons. Cian wanted to take her away but didn’t have the power to do so and her fearing her father used magic to send him back to Ireland before she gave birth.
One of the sons was named Lugh who would later grow up to become the Celtic sun god. He was known for his youthful looks and wielding a spear which in some tellings was on fire.
When Balor learned of his grandsons he took them and gave them to a servant and was ordered to throw them into a whirl pool telling them to drown the boys and let the sea take them. However Cian using the wind ended up saving his son’s and fled with them and in order to protect them Cian gave them to his brother and his wife as foster children so they could raise and protect boys while he fought Balor and his forces.
Lugh was one of the boys and the most famous. He would grow up to become a youthful warrior who yield a spear of flames as he would later become the Irish sun god. Lugh would later be taken into the tribe of gods with his father which in Celtic is called Tuatha De Danann.
Eventually Lugh along with his brothers would kill Balor their grandfather.
Lugh would also have a son named Setanna, but later became known as Cu Chulainn who many believed was the reincarnation of Lugh and was essentially our version of Hercules.
Connect this to One Piece
Luffy is the sun god and is son of Dragon who like Cian is connected to strong winds. Luffy like Lugh had 2 brothers, Sabo and Ace, and were raised by a foster mother named Dadan. Now Luffy when he was introduced in Morden time just narrowly escaped a whirlpool and would have drowned.
He held a spear which used magic to ignite in flames and Nika used a spear.
Lugh was a member of the Tuatha De Danann aka the tribes of gods Who projected Ireland from the evil gods. The D clan were also called the enemy of gods yet Luffy technically is a god and they are noted for the letter D in the middle of their names.
So, it raises a few questions now. If Luffy is Lugh, Dragon is Cian then who is Balor and Eithne?
We still don’t know who Luffy’s mother is, but the depictions of Balor sounds like Imu.
Balor was a evil man who feared the Tuatha De Danann and drew his grandsons into the sea for them to drown. Balor built 2 towers one for himself and one made of glass for his daughter and used his magical eye to watch everything, so no one could sneak up on him.
Now onto Irish History
About 900 years ago, the British came in and took over Ireland and held onto ireland for 800 years before they manage to gain independence in 1921. The world government existed for about 800 years now.
What happened was the British came in and killed the Celtic tribes calling them savages and immoral enemies of god. After they killed the majority of warriors they went about destroying religious figures and books that told stories about the Irish gods. Luckily, some artefacts were hidden and survived but a lot was not which is why a lot of Irish mythology has holes in it as we lost a few chunks.
Now the British then began teaching people about Jesus and Christianity converting Ireland into a Christian nation.
In order to make the transition easier, they combined Irish culture into the church and took the symbol of the sun god and combined it with the symbol of Christ the cross.this led to the creation of the Celtic cross.
Now if you were to look at it doesn’t it look very similar?
The British empire would only grow from there and eventually became so big the British would say things like the sun never sets on the British empire as it stretch so far. It would always be in the sun and if the sun never sets then it never raises and there would be now dawn or dusk.
But eventually, lands in Britain would rebel and fight back and become independent and the British empire fell. So all being said if Luffy is Lugh, Dragon is Cian and imu is Balor then could that mean Imu is Luffy’s other grandfather?
We don’t really know what happened to Eithne, but perhaps in One Piece her counterpart is still captured in the tower of Pangea with Imu and that is what Dragon wants as he wants to save her. Or perhaps Imu killed his own daughter.
Theory by MrBushido56 (https://www.reddit.com/user/MrBushido56)