For the second meaning, cf. Hadorion, a Húrin's epithet in WJ/294, Hurinionath referring to the house of Húrin the Steward in PM/202-3,218, and Gil-Galad's epithet Ereinion, cf. also the gloss of the old Qenya cognate yondo "descendant of" in PE/12:106, or the use of the same suffix in later Quenya names such as Isildurioni and Anárioni "Heirs of Isildur (resp. Anárion)" in PM/192,196
Noldorin
-ion
suffix. son
-(i)on
suffix. adjectival suffix
ionn
noun. son
ionn
noun. son
ionn
noun. scion, male descendant
-ion Reconstructed
suffix. -region, -land
For the second meaning, cf. Hadorion, a Húrin's epithet in WJ/294, Hurinionath referring to the house of Húrin the Steward in PM/202-3,218, and Gil-Galad's epithet Ereinion, cf. also the gloss of the old Qenya cognate yondo "descendant of" in PE/12:106, or the use of the same suffix in later Quenya names such as Isildurioni and Anárioni "Heirs of Isildur (resp. Anárion)" in PM/192,196