Wests Tigers hooker Api Koroisau will captain Tonga at his fourth World Cup, alongside clubmates Sunia Turuva, Solomone Saukuru and Josese Lanyon.
Tonga opens against the Cook Islands on Sunday, 18 October, at Newcastle's McDonald Jones Stadium, at 4:05pm AEDT.
Rising Tigers back Glassie Glassie will play centre for the Cook Islands, who meet Fiji at the same venue and time.
Tonga five-eighth Latu Fainu faces Tigers teammate Kai Pearce-Paul when Tonga plays England on Saturday, 17 October, at Perth's HBF Park, at 8.05pm.
Pearce-Paul returns from a pectoral injury. Jarome Luai has been named at five-eighth for Samoa, which opens against France on Friday, 16 October, at Parramatta's CommBank Stadium, at 5.45pm.
For Lebanon, Alex Twal is at lock and Tony Sukkar at second-row for the match against Papua New Guinea on Saturday, 17 October, in Port Moresby at 3.25pm.
In the women's tournament, Kezie Apps and Shaylee Bent will line up in the Jillaroos back-row against Samoa on Friday, 16 October, at 8.05pm. Sarah Togatuki was not selected for the match.
Raecene McGregor captains the Kiwi Ferns, with Shaniece Monschau on the interchange bench against Fiji on Sunday, 18 October, at 1.50pm.
Fiji's Losana Lutu will face her regular Wests Tigers scrum partner McGregor. Jetaya Faifua and Christian Pio are Samoa reserves against Wales on Friday, 16 October.
All matches will be shown live on Channel 7 and 7 Plus. Listed times are AEDT.