Conceptual Development: In the drafts of the Lord of the Rings appendices, Tolkien first gave his name as Ondohir, with a transient variation Ondonir (PM/195, 200). Ondohir was a “mixed name” whose final element was Sindarin S. hîr “lord” (PM/210). In the 2nd edition of The Lord of the Rings, Tolkien changed it to the pure Quenya name Ondoher.
ondohermasculine name. Stone Lord
ondonoun. stone, stone (as material), (large mass of) rock, stone as material, large mass of stone or great rock
ondo noun "stone" as a material, also "rock" (UT:459, GOND). Pl. ondor in an earlier variant of Markirya; partitive pl. locative ondolissë "on rocks" in the final version. Compounded in ondomaitar "sculptor in stone" (PE17:163), Ondoher masc.name, *"Stone-lord" (ondo alluding to Ondonórë = Sindarin Gondor, "stone-land") (Appendix A), #ondolunca ("k") "stonewain", possessive form in the place-name Nand Ondoluncava "Stonewain Valley" (PE17:28, also Ondoluncanan(do) as a compound). Ondolindë place-name "Gondolin" (SA:gond, J.R.R. Tolkien: Artist & Illustrator p. 193); see Ondo. Earlier "Qenya" has Ondolinda _(changed from Ondolin) "singing stone, Gondolin" (LT1:254)_
on, ondo noun "stone" (LT2:342, LT1:254 probably only ondo in LotR-style Quenya, see below). Various "Qenya" forms: ondoli "rocks" (MC:213; this would be a partitive plural in LotR-style Quenya), ondolin "rocks" (MC:220), ondoisen "upon rocks" (MC:221), ondolissen "rocks-on" (MC:214; the latter form, partitive plural locative, is still valid in LotR-style Quenya).
Ondoher means "Stone Lord" in Quenya (from ondo = "stone" and hér = "lord"), in reference to Gondor, the "Stone Land". The name "Ondoher" was spelled as Ondohir in early manuscripts, changed to Ondonir in a later manuscript, reverted to Ondohir in the first edition of The Return of the King, and finally became Ondoher in the second edition.
* sarnoun. stone, stone (small)