You don't give your source for your information, nor why you think Ferdinand is father of your Albert, but the following appears to match your Albert & Ferdinand.
1880 census Brenham, Washington Co, TX:
Category: Name;Relationship to head of household; Marital Status; Gender; Race; Age; Birthplace; Occupation; Father's Birthplace; Mother's Birthplace.
Fredricka WERTHWifeMFemaleW24PRUSSIAKeeping HousePRUSSIAPRUSSIA
8 pages away, could this be a brother to your Ferdinand?
Henrietta WORTHWifeMFemaleW18PRUSSIAKeeping HousePRUSSIAPRUSSIA
1870 census Austin Co, TX:
Werth, Ferdinand, 23, b Prussia, farm laborer, enumerated in the household of Ernst Malhamann 54, b Prussia with wife and children.Oldest children born in Prussian, first one born in TX is 9 yrs old.
1900 census Washington Co, TX:
Wierd(sic), Ferdinand, hd, b Aug 1847, 52, M 27 yrs, b G, G, G
" Fredica, w, b May 1850, 50, M 27, 9 ch, 6 lvg, b G, G, G
" Otto, s, b Jul 1873, 26, b TX
" Walter, s, b Mar 1883, 17, b TX
" Anna, d, b May 1885, 15, b TX
" Bertha, d, b Apr 1886, 13, b TX
" Albert, s, b Aug 1881, 10, b TX
" Ernest, s, b Sep 1891, 8, b TX
Ferdinand listed as arriving US 1869, here 31 yrs, and Naturalized.Fredica arriving US 1852, here 48 yrs, blank for naturalization. Owns farm.
1920 census Washington Co, TX:
Werth, Ferdinand, h, 62, M(1) 35 yrs, b Ger, Ger, Ger
" Mary, w, 60, M(1) 35 yrs, 9 ch, 6 lvg, b Ger, Ger, Ger
" ?, s, 32, sgl, b TX
" Albert, s, 20,, sgl, b TX
" Earnest, s, 18, sgl, b TX
Ferdinand arrived 1869, Naturalized - owns mortaged farm.Mary arrived 18??.Everyone in the household speaks German.
You might check land and probate records, see how Albert is listed as an heir.
You might want to check with the Galveston Library, I believe they have the ships passenger list records, and many of the Germans in TX came in through the port of Galveston.
Have you visited the Washington Co, TX GenWeb site?Click and look at what they have to offer, check list of volunteers who will do specific lookups.I see one who will do cemetery lookups:
And the archived section, too?Type in Werth and several items come up, among them marriage records and you can spot some of the children of Ferdinand.Also marriage of the Franz Werth to Henrietta Word.
Happy Hunting (^_^)