On 08 Oct 1857 William Eden 4th Baron Auckland (age 28) and Lucy Walbanke-Childers Baroness Auckland (age 21) were married. He the son of Bishop Robert Eden 3rd Baron Auckland (age 58).

On 03 Jun 1871 Frederick Charles Howard (age 30) and [his future sister-in-law] Constance Eleanora Caroline Finch-Hatton (age 20) were married. She the daughter of George Finch-Hatton 6th Earl Nottingham 11th Earl Winchilsea (age 56) and Constance Henrietta Paget Countess Nottingham Winchilsea (age 48). He the son of Henry Howard 2nd Earl of Effingham (age 64) and Eliza Drummond Baroness Howard (age 60).

On 06 Jul 1872 William Eden 4th Baron Auckland (age 43) and Mabel Emily Finch-Hatton Baroness Auckland were married at St Margaret's Church, Westminster [Map]. She by marriage Baroness Auckland of West Auckland. She the daughter of George Finch-Hatton 6th Earl Nottingham 11th Earl Winchilsea (age 57) and Constance Henrietta Paget Countess Nottingham Winchilsea (age 49). He the son of Bishop Robert Eden 3rd Baron Auckland.

On 20 Jul 1875 William Eden 4th Baron Auckland (age 46) and Edith Eden Baroness Auckland (age 15) were married. She by marriage Baroness Auckland of West Auckland. The difference in their ages was 30 years. He the son of Bishop Robert Eden 3rd Baron Auckland. They were second cousin once removed. She a great x 5 granddaughter of King Charles II of England Scotland and Ireland.

In or before 1887 [his brother-in-law] William Eden 7th and 5th Baronet (age 37) and Sybil Frances Grey Lady Eden (age 19) were married. She by marriage Lady Eden of West Auckland, Lady Eden of Maryland. He a great x 5 grandson of King Charles II of England Scotland and Ireland.

On 10 Apr 1888 [his son] George Eden (age 26) and [his daughter-in-law] Amy Violet Hay-Drummond (age 20) were married. She a great x 5 granddaughter of King Charles II of England Scotland and Ireland.