Who was Edward L Jolly parents and siblings and where were they from?

1910 St Tammany LA
Slidell ED 104 Pg 3A
JOLLY Edward L 35 born LA Parents born LA
JOLLY Nellie 35 born LA Parents born LA
JOLLY Arthur P 5 born LA
JOLLY Hilda V 3 born LA
JOLLY William H 3/12 born LA

1920 St Tammany LA
Police Jury Ward 6
ED 111 Pg 7B
JOLLY Nellie 47
JOLLY Arthur 14
JOLLY Hilda 12
JOLLY Willie 10
JOLLY Alvin 8
In both of these census the family is listed as Mulatto.
It looks like Nellie was widowed sometime after 1912