Half Second Cousin Once Removed is in Second Cousin Succession Heading.
In 1193 Robert Lacy 5th Baron Pontefract died without issue. His cousin Albreda Lissours (age 65) [daughter of his aunt Albreda Lacy] inherited his estates. His half second cousin once removed Roger Lacy 6th Baron Pontefract 7th Baron Halton (age 22) succeeded 6th Baron Pontefract 1C 1068. Maud Clere Baroness Lacy Baroness Warkworth by marriage Baroness Pontefract.
On 30 Apr 1755 Edmund Bacon 6th Baronet (age 74) died. His half second cousin once removed Richard Baron 8th and 7th Baronet (age 60) succeeded 7th Baronet Bacon of Redgrave in Suffolk. The two Baronetcies of Baronet Bacon of Redgrave in Suffolk and Baronet Bacon of Mildenhall in Suffolk were combined.
On 07 Oct 1923 Frederick William Hotham 6th Baron Hotham (age 60) died. His half second cousin once removed Henry Hotham 7th Baron Hotham (age 24) succeeded 7th Baron Hotham of South Dalton in Yorkshire, 17th Baronet Hotham of Scorborough in Yorkshire. Letitia Sibell Winifred Brownlow-Cecil Baroness Hotham (age 19) by marriage Baroness Hotham of South Dalton in Yorkshire.