In the early CSB's (121, p. 21) Armenian personal names were normally transliterated as -ian. In CSB 38, p. 73, this practice was changed to -yan. It is now normal practice to search the -ian form of the name and make a 400 ‡wnne reference.

NAFL8546276
100 10 Petrosyan, Eghishe
400 10 ‡wnne‡aPetrosian, Eghishe
670 His Hay Grakanutyun, 1960:‡bt.p. (E. Petrosyan) t.p. verso (E. Petrosian [in cyr.])
670 LC manual auth. cd.‡b(hdg.: Petrosyan, Eghishe; usage: Eghishe Petrosyan, E. Petrosyan; variants: E.M. Petrosyan, Egishe Manukovich Petrosian [in cyr.])
670 His Grakan demker, 1977, 1977:‡bt.p. (E. Petrosyan) cover, etc. (Eghishe Petrosyan; Eghishe Manuki Petrosyan, Egishe Manukovich Petrosian [in cyr.])

The earlier transliteration practice is not mentioned in the 670's.