— born in Wuerttemberg or PA:
4.  (Son A) STRAUB, b. 1835-40

— born in Allegheny Co., PA:
5.  William STRAUB, b. Jul 1842

1.  Marriage Record:

2.  1840 Census Index and Digital Images (online at Ancestry.com; Image #5-6 of 30; extracted by Diana Gale Matthiesen):¤•

1840

PA

Allegheny Co.

Pittsburgh West Ward

pp. 349B-350A

Ln. 1

Philip Stroup

201 000 100 - 001 001

0001000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	4 or under	1835-1840	= Son A = Christian? (b. 1831/2?)
1 male	10-14	1825-1830	= Jacob (b. 1825)
1 male	40-49	1790-1800	= Philip (b. 1791/2)
1 female	10-14	1825-1830	= Daughter A
1 female	30-39	1800-1810	= Barbara (b. 1801/2)
1	person engaged in manufactures and trades

Is Christian tallied in the wrong age class?  Or is his age in the 1850 census wrong?

3.  1850 Census Index/Images (online at Ancestry.com; Image #69 of 140):  Allegheny City (Ward 3), Allegheny Co., PA, p. 131A, 584/636, enumerated 7 Oct 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤•

Phillip Straub	58	M		Baker	1000	Germany
Barbara Straub	48	F				do
Jacob Straub	25	M		Baker		do
Christian Straub	18	M		do		do
William Straub	8	M				Pa

4.  1860 Census Index/Images (online at Ancestry.com):  can't find anyone, except Jacob, and I really looked.  William turns up in 1870.