Johnielle Keith "Kit" Pasion Nieto (born January 31, 1969) is a Filipino lawyer and politician who last served as the municipal administrator of Cainta, Rizal from 2022 to 2024 under the administration of his wife, Mayor Maria Elenita "Ellen" Nieto.

[7] Johnielle Keith is the son of medical doctors Rolando Nieto and Ethelyn Pasion with five siblings.

[8] His mother was also an undersecretary of the Department of Health, while his brother Jan is a recording artist who competed on Philippine Idol.

[8] His other brother Jet was a member of the 1987 and 1988 Ateneo Blue Eagles championship teams.

[9] Nieto graduated from the Ateneo de Manila University with a Bachelor of Arts degree in political science.