three brothers

[Trees]

THREE BROTHERS sons of Daniel and Ann, Daniel, Thomas and Joseph each had a son Daniel
Daniel: Daniel 1722
Thomas; Daniel 1723
Joseph:  Daniel 1730

There are children baptised and buried in Sedgley and near places  on FREEREG 1740-1770
Benjamin FLAVEL    Burial    25 Jan 1741/42  Cotwallend son Daniel & Mary  a brother not son

Sarah FLAVILL    Baptism    13 Apr 1746       Daniel & Mary Over Gornal
Sarah FLAVILL    Burial    13 May 1746       Gornalwood dau Daniel & Mary
Richard FLAVILL    Burial    22 Mar 1746/47            Gornalwood son Daniel & Mary
Jonah FLAVILL    Baptism    13 Mar 1747/8            Daniel & Mary Gornalwood
John FLAVILL    Baptism    28 Oct 1750       Daniel & Mary Gornalwood
Samuel FLAVILL    Baptism    17 May 1752       Daniel & Mary Gornalwood nailer
Mary FLAVILL    Baptism    17 Nov 1754       Daniel & Mary Cotwallend
Joseph FLAVILL    Baptism    18 May 1755       Daniel & Mary Gornalwood nailer

Stephen FLAVILL    Baptism    28 Jun 1752       Daniel & Sarah Over Gornal
Elizabeth FLAVILL    Baptism    24 Mar 1758    Daniel & Sarah Cotwallend  nailer
Daniel FLAVILL    Baptism    06 Mar 1763       Daniel & Sarah Modenhill

burials
Daniel FLAVEL    Burial    10 Aug 1736    Gornalwood nailer
Daniel FLAVEL    Burial    01 Dec 1741    Cotwallend  nailer
Daniel FLAVILL    Burial    15 Jul 1751    Gornalwood 
Daniel FLAVIL    Burial    23 Feb 1780    Gornalwood


The problem is I can't find any marriages for a Daniel and cant decide who married who.
Is there one or more Dan/Mary couple?
Who married Sarah?
Who do the burials belong to?

Hope someone has a few ideas of how to sort the problem.
 Thank you for your interest