Baker in Lancaster County, PA

I am looking for the parents of my great-grandfather, Isaac Caskey Baker, b. 1828 in West Lampeter Township, Lancaster County, PA and I'm lost in the maze of Baker families in Lancaster.  Isaac's middle name would suggest a connection with the Caskey family but that lead has not produced anything certain.  Isaac was married in a Lutheran Church to Elizabeth Froelich of Strasburg Township, but I have not found a Baker family in any of the area churches of that denomination. Elizabeth died childless and Isaac later married Mary Catherine Eckert in Philadelphia. Isaac left Lancaster County in 1852  The 1830 census gives me one possibility, Peter Baker m. to Rebecca Caskey Baker, but the census does not indicate a male child under 5 yrs. in this household.  Can anyone help?