Spouse of Tar-Ancalimë, the first ruling queen of Númenor (UT/211). His name seems to be a compound of halla “tall” and the suffixal form -car of carma “helm”.
Quenya
carma
helm
carma
noun. helm
hallacar
masculine name. *Tall Helm
carma-cundo
proper name. Helm-guardian
A title of Minalcar as the regent of Gondor (PM/260). This name is a compound of carma “helm” and cundo “guardian”. Elsewhere cundo means “prince” or “lord” (Ety/KUN, PE17/117). This might still apply here, since Minalcar was heir to the throne. Furthermore, the crown of Gondor was originally a helmet (LotR/1043 note #1), so perhaps: Carma-cundo = “Crown Prince”.
valacar
masculine name. *Vala Helm
cassa
helmet
cassa ("k")noun "helmet" (KAS; though spelt cassa also in the Etymologies as printed in LR, VT45:19 indicates that Tolkien's own spelling was kassa). Cf. carma in a later source.
castol
helmet
castol noun "helmet", synonyms tholon (q.v.), sól (q.v), also variant castolo ("k")(PE17:186, 188)
harna
helmet
harna (3) noun "helmet" (VT45:21)
harpa
helmet
harpa noun "helmet" (VT45:21)
sól
helmet
sól, also solma or solos, noun variant words apparently for "helmet", cf. castol, q.v. (PE17:188)
tholon
helmet
tholon noun "helmet", variant of castol (q.v.), though Tolkien might have mistakenly marked it as Quenya instead of Sindarin (PE17:186)
þolon
noun. helmet
castol(o)
noun. helmet
carma (2) noun "helm" (helmet) in Carma-cundo ("k") "Helm-guardian" (PM:260). Notice that in PE17:114, Tolkien indicated that he rather wanted carma to mean "tool" or "weapon", leaving the status of carma "helmet" uncertain. Possibly shortened to -car in the names Eldacar (Elfhelm?), Hallacar (Tall-helm?) Cf. also cassa in Etym.