Painting with unknown signature

[GibH]

I can't make out anything other than an "M". I'm not even positive if that is a signature.

 

[Mackaydon]

For starters, you can rule out Claude Monet.
Don.....

 

[Lost&Found]

The first three letters look like man (Manning?)

 

[JimDon]

It almost looks like Manuel to me

 

[tamrock]

Many times referred as "unknown artist" and there is a market for them.