|ז לְמַטֵּה יִשָּׂשכָר, יִגְאָל בֶּן-יוֹסֵף.||7 Of the tribe of Issachar, Igal the son of Joseph.|
Another interesting point to mention is that we have hear the reuse of a name, something that happens infrequently but does occur (e.g. genealogical lists in beginning of Bereishit), or see other . Here, we have Yosef not only as a son of Yaakov but as a descendant of Yissachar's brother. Perhaps this Yosef was even named after his great (...) uncle.
While on the subject of naming after others, one interesting one occurs in the very beginning of this week's parsha, Korach. We have Datan and Aviram.
As Speiser writes in Anchor Bible Genesis:
The underlying form Abram and its doublet Abiram are best explained as "the (not `my') father is exalted"...