She married in 1613 and took up residence in Heidelburg.
The Wikipedia article for Michiel Jansz. van Miereveldt (also spelled van Mierevelt) is here.
From Wikimedia; linear flaws in the background fixed with Photoshop by gogm.
Elizabeth Stuart wears a saya-type dress with a circular lace ruff in this 1623 portrait by van Miereveldt. Its 1623 and hanging sleeves are hanging on in Germany along with false sleeves. She does not appear to be wearing balloon sleeves, instead she wears long puffed sleeves like Ladies would wear until late in the century.
Keywords: 1612, van Miereveldt, Queen Elizabeth of Bohemia, Stuart family, Wittelsbach family, Princess, Queen, frizzy coiffure, high enclosing neckline, feathered headdress, saya, ruff, lace, earrings, necklace, girdle, tabbed sleeves, long puffed sleeves, hanging sleeves, false sleeves, vee waistline