Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

atto

noun. father, father (hypocoristic)
Qenya [Ety/ATA.011; LR/059.1003; PE22/023.1612] Group: Eldamo. Published by

atto

noun. father
Qenya Group: Eldamo. Published by

tatto

noun. father
Qenya Group: Eldamo. Published by

atta

noun. father, father (child’s word)
Qenya [PME/033.3707; QL/033.3301] Group: Eldamo. Published by

attu

noun. father
Qenya [PE16/135.8301; PE16/135.8303; PME/033.3708; QL/033.3401] Group: Eldamo. Published by

atar

noun. father
Qenya [LT1A/Ilúvatar.020; PE15/72.1704; PE15/72.2202; PE15/72.2203; PE15/72.2302; PE15/72.2303; PE15/76.0603; PME/033.3703; QL/033.3501] Group: Eldamo. Published by

atar

noun. father
Qenya [Ety/ATA.007; Ety/ATA.009; LR/061.3901; PE22/018.0504; PE22/046.0903; PE22/047.1105; PE22/118.1713; PE22/119.1305] Group: Eldamo. Published by