adoptedly

From adopted +‎ -ly.

adoptedly (not comparable)

1. By adoption.
   • c. 1603–1604 (date written), William Shakespeare, “Measure for Measure”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act I, scene iv]:

     LUCIO: Is she your cousin?
     ISABELLA: Adoptedly, as schoolmaids change their names / By vain though apt affection.