In regard to the source of the two Palestinian Targums to the Pentateuch, we must accept the conclusion of Bassfreund 4 that they both derived their variants from a complete Targum Jerushalmi.
Artakshatsu, Susian Irtakshashsha (and variants), Gr.
The legend, which has never been traced to its ultimate source, had many variants, especially as regards the situation attributed to Manoa.
whether mere variants or not), and as to many others which are defaced or broken in our texts.
we find Targums to the Song of Moses and to the Decalogue, in which this process has been fully carried out, the text of Onkelos being given as well as the variants of the Fragmentary Targum.