What 溤 means
It names a river and is recorded as a variant of 馮.
The old Chinese dictionary 《玉篇》 glosses 溤 as “water”; the book was compiled in 543.
A transmitted passage in 《後漢書》, a history of the Later Han dynasty, gives the personal name 馮異 in the spelling 溤異. A Taiwanese Ministry of Education dictionary of character variants records 溤 as a variant of 馮 in that name. The passage as it survives does not by itself show that this spelling was used during the Han period.
A specialized Chinese character documented in a river name and a historical personal name.
Keep 溤 where your source uses that spelling; its variant status does not make it a general replacement for 馮.
Questions people ask
1Why does 溤 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 溤
溤\6EA4Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.