Unfortunately I do not speak French good enough to check and resolve which writing is correct. Each has only one release, so it is not a big task to merge.
Clothdrum
Philippe L'Enfant de Dagobert would be the correct French written form.
It would be the correct form if it would be the translation of "Philippe the children of Dagobert" but I suspect that Lenfant is his real name, it won't be the first person called Lenfant I see. His label called him Lenfant: http://www.musearecords.com/ext_re_new_catselect.php?np=1625
A search in the net took me to these YouTube and Facebook channels, assuming these are the official artist's channels. In both the artist is spelled "...Lenfant..."