changeling

In pre-modern European folklore: an infant of a magical creature that was secretly exchanged for a human infant. In British, Irish and Scandinavian mythology the exchanged infants were thought to be those of fairies, sprites or trolls; in o

[S]he, as her attendant, hath / A louely boy ſtollen, from an Indian king: / She neuer had ſo ſweete a changeling.

Every Lover admires his miſtris, though ſhee be very deformed of her ſelfe, [...] her feet ſtinke, ſhee breed lice, a meere changeling, a very monſter, [...]: if he loue her once, he admires her for all this, he takes no notice of any ſuch errors, or imperfections of body or minde.

A person or object (especially when regarded as inferior) secretly exchanged for something else.

When I firſt read Mr. Walker’s Circular Letter to the Arch-deacons, I fancied he intended to give us an Account of thoſe worthy Men, [...] But after about ten Years going with this Work, and that the Time of its Birth was come, I ſoon found it to be a perfect Changeling. Inſtead of what I expected it to be, I ſaw a huge Heap of the moſt Heterogeneous Characters, [...] a great many of them much more deſerving to have their Names blotted out, than their Memory to be preſerved.

An infant secretly exchanged with another infant deliberately or by mistake; a swapling.

An organism which can change shape to mimic others; a shape-shifter.

A person apt to change their loyalty or thinking; a waverer.

To face the garment of rebellion / With ſome fine colour that may pleaſe the eye / Of fickle changlings and poore diſcontents, / Which gape and rub the elbow at the newes / Of hurly-burly innouation, [...]

Fal[staff]. [...] If you will lodge with me in Eaſtcheap, you ſhall ſee the thouſand pound fairly ſpent in ſack: you ſhall ſhare with me to the utmoſt farthing. But for dry reſtitution, I have not been accustom'd to it of many years. You would not have me a changeling at this time of day, I hope, Maſter Shallow. / Shal[low]. Changeling! no, Sir John, thou art no changeling; but, depend on it, I will not put up with this wrong. [...] I will have my money; depend on't I will have my money.

Changeable, fickle, inconstant, wavering.

Away thou changeling motley humouriſt, / Leave me, and in this ſtanding wooden cheſt, / Conſorted with theſe few books, let me lye / In priſon, and here be coffin'd, when I dye.