LN: R (it's a surname of German origin)
DH: PG, 79
DW: JP, 80
DD: AL, 55
DD: JE, 53
DD: HG, 51
DD: NJ, 48
DD: JO, 45
DS: MT, 42
DS: DL, 33
JE's family:
LN: W
DH: GA, 53
DW: JE, 53
DD: JL, 27
DS: AI, 25
DD: VC, 20
DD: SK, 18
HG's family:
LN: M
DH: K, 52
DW: HG, 51
DS: RG, 24
DS: IJ, 21
DD: NC, 19
NJ's family (1):
LN: W
DH: RS, 50
DW: NJ, 48
DD: CE, 24
DS: SJ, 21
NJ's family (2)
LN: C (children are hyphenated, C-R)
DH: JR, 45
DW: NJ, 48
DD: EJ, 8
DS: RA, 6
MT's family:
LN: R
DH: MT, 42
DW: DJ, 42
DD: GM, 11
DS: MD, 7
DD: LH, 6
Good luck! :-D