[name_m]Philip[/name_m]. The extra ‘l’ in [name_m]Phillip[/name_m] looks superfluous to me.
Although the more I read it on this thread, the less I like it (sorry).
I prefer [name_m]Philip[/name_m] because it’s the biblical spelling.
I grew up in Germany so I always want to spell it [name_m]Philipp[/name_m] however the double p at the end of a name always looks a bit odd so I guess [name_m]Philip[/name_m] would be preferable. (Usually I go for the shortest/easiest to spell of multiple options - when in doubt KISS principal.)
[name_m]Philip[/name_m] looks better and cleaner