Rafael and Fabio were signed from the Brazilian Club (forgot the
name already)
Macheda was signed from Lazio when he was young.
Yup, Rafael and Fabio were signed as youth and so is Macheda.
But all were further groomed in United's Youth set up before they
were thrown into the first team foray.
Rafael's professional football career began with Fluminense in
Brazil, where he played at youth level.Rafael and his brother Fábio
were brought to the attention of Manchester United by club scout
Les Kershaw in the summer of 2005 while playing for Fluminense in a
youth tournament in Hong Kong. Manchester United got in touch with
Fluminense and asked permission for the twins to travel to
Manchester to train with them in 2005. Shortly afterwards, a scout
claiming to represent Arsenal visited the twins and asked them to
come to England to train with Arsenal without the permission of
Fluminense; however, they were dissuaded from this by their mother,
who reminded them that they had been with Fluminense since they
were 11, and that they should show the club some loyalty. The twins
were also approached by Real Madrid while they were on
international duty with Brazil.
Born in Rome, Macheda began his football career with local side
Lazio. However, due to Italian football regulations preventing
under-18s from signing professional contracts, he was not
permanently tied to the club, and shortly after his 16th birthday,
he was signed by Manchester United of England, where regulations
permit the signing of players aged 16 and up. Following his
family's relocation to England, he officially joined the club as a
trainee on 16 September 2007, and began a three-year scholarship in
the club's Academy.
I forgot to mention these names as well:
Darron Gibson and Jonny Evans.
There are a few youth graduates who are doing relatively well
but have since left United: