Shortest BLOOD relationship Caliph ʻUthmān Ibn ʻAffān is Umar ibn al-Khattab's fifth cousin once removed.
Caliph ʻUthmān Ibn ʻAffān is your third cousin 40 times removed.
https://www.geni.com/path/%F0%9D%97%94%F0%9D%97%B5%F0%9D%97%BA%F0%9...
Illustrious Lineage, indeed. Documented, first by Savage.
Shortest in-law relationship
Caliph ʻUthmān Ibn ʻAffān is your 22nd great grandfather's partner's 6th great aunt's husband's fourth great uncle's wife's father.