Definition of "Imogen"

Ile write to my lord ſhe's dead: O Imogen! / Safe mayſt thou wander, ſafe returne agen.

1611 April (first recorded performance), William Shakespeare, “The Tragedie of Cymbeline”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene v], page 385, column 1

She would have to change her own name as well, she'd never liked Tracy. Imogen or Isabel, something feminine and romantic. She supposed she didn't look like an Imogen. Imogens were middle-class Home Counties girls with long blonde hair and vaguely Bohemian mothers.

2010, Kate Atkinson, Started Early, Took My Dog, Doubleday, pages 83–84