Beyonce Knowles is officially a big sister again. A DNA test has confirmed that Mathew Knowles is the father of Alexsandra Wright's brand new baby boy ... sources tell TMZ.


With the DNA test a match, we're told lawyers for Knowles and Wright are in the final stages of negotiating a settlement for baby Nixon's child support.

Wright filed a paternity suit last October against Knowles -- who was temporarily ordered to pay $8,200 in monthly child support.

Wright claims she had an 18-month affair with Knowles.

As far as we know, nothing's tricky about Nixon .... so far.

Beyonce's father, Mathew Knowles, has just been ordered to support baby Nixon, at least temporarily ... TMZ has learned.


An L.A. judge just ordered Knowles to pay $8,200 a month in child support, retroactive to February 1. Knowles must also pay 100% of uninsured medical costs.

Alexsandra Wright claims she had an 18-month relationship with Knowles and he's the baby daddy of Nixon -- born February 4.

Wright's lawyer, Neal Hersh, went to court today asking for support and the judge granted it.

But Knowles will take a DNA test March 1 ... and the long-term support issues hinge on the outcome.

It's interesting -- Knowles has not flat out denied he's the daddy. And in fact, he gave Alexsandra $10,000 in January to cover uninsured medical costs and baby stuff.

UPDATE: The Judge ordered Knowles to pay Wright $20,750 for the month of January.