From fiend + -ling.
fiendling (plural fiendlings)
- A miniature fiend; fiendkin.
- A subordinate or underling spirit; imp.
1880, George Marshall Sloan, The telephone of labor - Page 114:For should its faint pulsations cease Ere he had coated it with grease, His God would clutch it, and condemn The fiendling to eternal flame.