Duo :

According to the Red Book of Westmarch, In Middle-earth, Duo Maxwell was a World-famous Hill-troll
Elven Name Possibilities:
The root name suitable for feminine and masculine is: Helkadol
Another masculine version is: Helkamorgûlion
Hobbit lad name: Polo Green from Oatbarton
Dwarven Name: Dwalin Oakenhand- This name is for both genders.
Orkish Name: Búrzkrísh the Despot- This name is for both genders.

According to the Red Book of Westmarch, In Middle-earth, Heero Yuy was an Inbred Giant
Elven Name Possibilities:
The root name suitable for feminine and masculine is: The root name suitable for feminine and masculine is: Minyagon
Another masculine version is: Minyagonion
Hobbit lad name: Isengrim Roper from Hardbottle
Dwarven Name: Narin Cleversinger- This name is for both genders.
Orkish Name: Gutkûr the Sly- This name is for both genders.

According to the Red Book of Westmarch, In Middle-earth, Trowa Barton was a Wicked Dúnedain
Elven Name Possibilities:
The root name suitable for feminine and masculine is: Firmenel
Another masculine version is: Firmenelion
Hobbit lad name: Sancho Brown from Gamwich
Dwarven Name: Bifur Coalskull- This name is for both genders.
Orkish Name: Oldûl the Insane- This name is for both genders.

According to the Red Book of Westmarch, In Middle-earth, Quatre Raberba Winner was an Jealous Stone-troll
Elven Name Possibilities:
The root name suitable for feminine and masculine is: Burzloss
Another masculine version is: Burzlossion
Hobbit lad name: Haltred Green from LongCleeve
Dwarven Name: Lár Halflinghand- This name is for both genders.
Orkish Name: Grotdreg the Devastator- This name is for both genders.