A proud US father has named his son after a computer software term.

Jon Blake Cusack, from Michigan, told local newspapers the US
practice of adding "Junior" or "II" after a boy's
name was too common.

So, when his son was born last week, he decided on the name Jon Blake
Cusack 2.0, as if he were a software upgrade.

Mr Cusack admitted that it took months to persuade his wife, Jamie,
to accept the idea.

Mrs Cusack said she asked several friends if they approved of the
name.

All the men, she said, felt the name was "cool". However
her women friends were less impressed.

"I think the women will end up liking it," she said.

Mr Cusack told the local newspaper he got the idea from a film called
The Legend of 1900, in which an abandoned baby is given the name 1900 to
celebrate the year of its birth.

"I thought that if they can do it, why can't we?" he said.

After little Jon Version 2.0 was born, Mr Cusack even sent a
celebratory e-mail to family and friends designed to look as though he
and his wife had created new software.

"I wrote... stuff like 'there's a lot of new features from
Version 1.0 [Mr Cusack himself] with additional features from
Jamie'," he said.

And he is already planning for his son's future.

"If he has a child, he could name it 3.0," he said.