Sabhāpati/Sahaṃpati/Sahāṃpati, Sahāpati brahmā. Sahā means the earth, the name of the world-system. The Sanskrit root sah means to endure. The world is full of suffering. The inhabitants of the world have to endure the sufferings. Hence it is called Sahā. Sahāṃpati Brahmā is the Lord who governs the Sahā lokadhātu.

Buddhānusmṛti - A Glossary of Buddhist Terms

Aṭṭhasālinī. I. 119. Paramatthajotikā Nāma Jātakaṭṭhakathā. III. 212. Lalita-Vistara. VI. 50-51. Majjhima Nikāya. Bodhirājakumāra.

○páti m. the president of an assembly or council VS. Kathās. &c. [Page 1151, Column 3]
• N. of Bhūta-karman MBh
• of an author Cat
• -vilāsa m. N. of wk

Sanskrit-English Dictionary, by M. Monier William