Where and when was born no one knows (In truth, it's not interesting to him, either).  Parents and relatives have never been(that would always be so).
In his childhood he grew up in a shelter in Edoras, until he grew up to seven years (probably at seven, we do not know when he was born)
Then he burned the shelter and escaped in fear, well that no one was hurt (which can not be said about the shelter and the houses near)
He went west and went a lot of leagues, well, it seemed to him (his feet are small)
After so many days and nights (he could not count, this is not exact), he wandered into dunland.
There he was sheltered by the Dunlings' family, they fed him, taught him to count (up to ten) and first gave him a ride on a horse (then he realized that it was a cow).
Burning the next house to the ground, he went further to the north-west(choosing the side at random)                                                                                                                                  After days and nights, about ten, he was attacked by terrible undead and stole to his crypt (as it turned out the undead were very afraid of the fire)
creating another conflagration and stealing clothes and jewels from the crypt, he went to the north (or rather crawled from the gravity of the loot).                                                              He was in Bree, he was greeted like a king, given a room in a prancing pony, fed very tasty and even served beer. As he later understood, he was confused with some kind of hobbit returning from the another one journey.
(Unfortunately, after drinking beer, all the valuables were stolen from him).                           And so he went to Shire to return the stolen goods (where he finally became addicted to alcohol and tobacco).                                                                                                                         So he lived wandering from one shelter to another. Until the war came (he realized that it's time to set fire to the enemy and his allies)!