I rolled randomly in the halfling name tables in XGtE, and came up with Eddie Wildheart. I like it, so will go with it, unless last names need to be more themed to family history or profession.
As far as background, decided to go with Merchant/Trader, very in line with light foot halflings in the setting.
This is what I was thinking, this will be my usual long thought train.
Eddie comes from a merchant clan who trades across the veil and beyond (no fixed location, though clan members could be found in various places if necessary).
As is tradition for the clan, when children come of age, they are given some capital and set off to build their own businesses. In this way, they test and prove their abilities. Most eventually return to the clan, bringing in new stock, trade routes, skills and other opportunities. This allows the clan business to expand and diversify.
After a period as an apprentice under his uncle (children are preferred to be apprenticed under someone other than their parents), Eddie was given a small amount of gold and set off to establish himself in Brindol and surrounds.
Having a keen interest in weird and interesting artefacts and other items, Eddie set himself up as an import/exporter of strange items and artefacts, of middling success.
Eddie enjoys the work, but his desire to do well is more due to family expectation, than any particular ambition.
At heart, Eddie is family focused, and feels he can do better before returning to the family fold.
At some point, while looking to acquire some new stock, Eddie found himself in a dangerous situation. Pleading for help, Eddie found it from an unexpected source.
One of the items he was looking to acquire for stock, An old amulet, dusty gold with a crystal in the centre, and strange symbols circling it, spoke to him, offering him power and survival in exchange for service.
Feeling he had no option, Eddie took the deal, and entered the service of his Patron, who communicates with him directly through the amulet, which also serves as an arcane focus.
In exchange for his surviving, Eddie was, reluctantly, made to take up his Patron’s crusade against the forces of darkness, and, at his urging, joined up with the Watchers in order to do so.