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
rhovanion
place name. Wilderland
-ian(d)
suffix. -land
calad
gerund noun. light
calad
noun. light
gail
noun. bright light
gal-
prefix. light
galad
noun. light
glaur
noun. golden light (of the golden tree Laurelin)
glor-
noun. golden light (of the golden tree Laurelin)
lhîn
noun. pool
lhîn
noun. pool
liniath
noun. pools
rhim
noun. cold pool or lake (in mountains)
rhimb
noun. cold pool or lake (in mountains)
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