HATTIE is listed in the Chambers Appendix 'Some First Names' in editions except the 12th (2011), from which the section was "untimely ripp'd". HATTIE = diminutive of HARRIET = feminine form of HENRY = 'house ruler' (Germanic).
In 24dn the two sections of SERAI, SE and RAI are to be 'transferred', ie changed over or exchanged, to produce RAISE.