Many of the newly appointed senators are from the ruling junta and people close to its key figures.
Some of the new Senate’s members sat in the committee tasked with nominating senatorial candidates to be selected by the National Council for Peace and Order.
These include General Tanasak Patimapakorn, Admiral Narong Pipattanasai, Air Chief Marshal Prajin Juntong and Police General Adul Sangsingkeo, who recently left the Cabinet shortly before their appointment as Upper House members.
The full list of 250 newly appointed senators was announced in the Royal Gazette on Tuesday.
More than 100 of them are retired or active high-ranking officers from the armed forces and the police, including 70 from the Army, 12 from the Navy, eight from the Air Force and 12 from the Royal Thai Police.
Many new senators are family members of people in power.
These include General Preecha Chan-o-cha, who is the younger brother of Prime Minister General Prayut Chan-o-cha; Air Vice Marshal Chalermchai Krea-ngam, who is the younger brother of Deputy Prime Minister Wissanu Krea-ngam; Admiral Sitsawat Wongsuwan, who is the younger brother of Deputy Premier and Defence Minister General Prawit Wongsuwan; and Som Jatusripitak, who is the elder brother of Deputy PM Somkid Jatusripitak.
Fifty of the 250 senators were selected from occupational representatives, six are ex-officio members from the military and police, and 194 are from candidates nominated by the selection committee.