Around 1134 [his father] Louis Loon I Count Loon (age 26) and [his mother] Agnes Metz Countess Loon (age 20) were married. She by marriage Countess Loon.
In or after 1136 Henry Count Loon was born to Louis Loon I Count Loon (age 28) and Agnes Metz Countess Loon (age 22).
Around 1180 [his mother] Agnes Metz Countess Loon (age 66) died.
Before 02 Aug 1218 [his brother] Louis II Count Loon was fatally poisoned. His brother Henry Count Loon (age 82) succeeded Count Loon.
On 02 Aug 1218 Henry Count Loon (age 82) was fatally poisoned a few days after his [his brother] brother had been. His brother [his brother] Arnold III Count Loon succeeded III Count Loon.
Maternal Family Tree: Henry Count Loon
Father: Louis Loon I Count Loon
Henry Count Loon
GrandFather: Folmar V Count Metz
Mother: Agnes Metz Countess Loon