illegitimation
noun1
Obsolete The act of making illegitimate; illegitimization; bastardization.
2
Obsolete The state of being illegitimate; illegitimacy.
- Gardiner had performed his promise to the queen of getting her illegitimation taken off.1679–1715, Gilbert Burnet, “(please specify the page)”, in The History of the Reformation of the Church of England., London: […] T[homas] H[odgkin] for Richard Chiswell, […]: