Posidonius was born in -135.
Posidonius died in -51.
The world may never know! For real nobody knows. Though he died on 51 B.c. on Rhodes or Rome no body knows where for sure.
There was no "one" Druid leader mentioned by name, though Julius Caesar mentions the existence of a head Druid; note however, that this is in reference to Gaul (in his Gallic Wars), not Britain as you most likely mean ("time of the Roman invasion" is terribly ambiguous, both as to date and geography, as there are atr least a couple options for each combination). We have almost no details about this class of peoples, except for brief mentions by writers like Posidonius, Caesar, and Tacitus. Posidonius separated the special upper class into three groups: bards, vates, and druids. The vates, according to Posidonius, were the seers, nature studiers, and overseers of sacrifice, while the druids were more concerned with law. Caesar combines the two levels, describing a priestly upper-class concerned with sacrifice and religious rituals, but also committed to memorization of all knowledge, incluuding natural history and law. Although describing the situation in Gaul, Caesar does say that most think Druidism originated in Britain. However, most details actually come from Gaul, and most Roman accounts merely quote Posidonius in their details, notably Strabo, and even Caesar had clearly read his accounts.
World maps were common in the Middle Ages, though they were never very accurate. The more accurate maps of the time called portolans were not maps of the known world, as far as I know. World maps of earlier times were also not uncommon, but were no better. There is a link to a world map of Posidonius, dating to 130-150 BC, below.
she was born when she was born she was born when she was born
Boyence was born at? Where was yuyi born? When elisabeta born? When was palto born? When was yhgjh born? When was shera born? When was myunwa born? When was fuzuli born? When was sullar born? When was mjfast born? Were was she born at? Where was sonai born? Where wasstluke born?
To become born: He is being born. He was born. He will be born.
you were born on means the date. you were born in means where you were born.
Stephen Born was born in 1824.
Friedrich Born was born in 1903.
Anne Born was born in 1924.
Ernest Born was born in 1898.