The Divisions of Genesis - 2
nGen. 10:1 “Now these are the records of the generations of  Shem, Ham, and Japheth.  ...”
nGen. 11:10 “These are the records of the generations of Shem.  …”
nGen. 11:27 “Now these are the records of the generations of Terah.  ...”
nGen. 25:12 “Now these are the records of the generations of Ishmael ...”
nGen. 25:19 “Now these are the records of the generations of Isaac ...”