The story
- Proto-Indo-European*mon-
- Proto-Germanic*mann-
- Proto-West Germanic*mann
- Old Englishmann
- Middle Englishman
- Englishman
- Ancient Greekσφαῖρᾰ (sphaîră)
- Latinsphaera
- Late Latinsphēra
- Old Frenchsphere
- Middle Englishspere
- Englishsphere
- English todaymanosphere
From man + -o- + -sphere, after the pattern of blogosphere.
Etymology from Wiktionary, CC BY-SA 4.0.