The lawyer has become a father to a baby girl with his new wife Stephanie. According to reports in Sweden the baby arrived on 13 February, and the couple have named her Katinka – which is Stephanie's mother's middle name.
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The pretty blonde, who is one of Madeleine's best friends, wed Jonas in August. Their wedding came two months after the Swedish princess tied the knot with American financier Chris O'Neil.
Stephanie and Jonas wed in the charming Stora Mellosa Church of the beautiful town of Orebro in the very heart of Sweden.
Thirty-four-year-old Jonas is well known to royal watchers for his eight-year relationship with Madeleine, whom he was due to marry.
But the end to one of Europe's most glamorous royal romances came when Madeleine called off the engagement following the supposed infidelity of her fiancé with model and sportswoman Tora Uppstrom Berg, who revealed that she had had a brief affair with the Swede at an exclusive ski resort.