A secondary source gives our subject middle name "Osro," but I have seen him only with middle initial, "O."

— born in Mayville, Chautauqua Co., NY:
3.  William Alexander LYON, b. 25 Oct 1895

— born in NY or PA:
4.  Vivian LYON, b. 1899; d. 1899

— born in Youngsville Borough, Brokenstraw Twp., Warren Co., PA:
5.  Iva Pearl LYON, b. 3 Mar 1902; d. 19 Aug 1968, Youngsville, Warren Co., PA; m. 26 Oct 1920, Jamestown, Chautauqua Co., NY, Robert Charles GIBSON
6.  Olive A. LYON, b. 21 Jan 1906; d. 23 Oct 1983, Jamestown, Chautauqua Co., NY; m1. Nicholas DE PAS; m2. Ralph PRATT, Sr.
7.  Ivan Eugene LYON, b. 12 May 1908; d. 25 Nov 1984; m1. ca. 1940, Margaret HOLLAND; m2. ca. 1950, Alice HOLLAND

1.  Marriage Record:

2.  1870 Census Every-Name-Index/Images (online at Ancestry.com):  George LYON (æ 12, b. IN) is living in Sugar Grove Twp., Warren Co., PA, with his parents (q.v.).  Maryett MATASON (æ 1, b. PA) is living in Deerfield Twp., Warren Co., PA (p. 118A), with her parents, Leonard MATASON (æ 35, b. NY) & Hannah (æ 30, b. NY), plus sibling.

3.  1880 Census Every-Name-Index/Images (online at Ancestry.com):  can't find George.  Ettie MADISON (æ 11, b. PA) is living in Pittsfield, Warren Co., PA (p. 195C), with her parents, L. W. MADISON (æ 44, b. NY) and Hannah (æ 40, b. PA), plus siblings.

4.  1890 Census:  the 1890 Census Population Schedules were destroyed.

5.  1900 Census Every-Name-Index/Images (online at Ancestry.com, Image #11 of 38):  520 Palmer Street, Jamestown City, Chautauqua Co., NY, Roll T623_1015, p. 45A, SN 6, SD 16, ED 114, enumerated 5 Jun 1900, official enumeration date 1 Jun 1900 (extracted by Diana Gale Matthiesen):

1900:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

19

20

21

22

23

24

25

27

*

520

104

124

Lyon George O

Head

W

M

Nov 1856

43

M

14

PA

PA

NY

Carpenter

6

Y

Y

Y

R

H

____ Mary E

Wife

W

F

Nov 1867

32

M

14

4

3

PA

NY

PA

Y

Y

Y

____ Hiram E

Son

W

M

Jun 1887

12

S

PA

PA

PA

At school

9

____ Maude L?

Dau

W

F

Dec 1889

10

S

PA

PA

PA

At school

9

____ William A

Son

W

M

Oct 1895

4

S

NY

PA

PA

*Palmer Street

Both of George's parents were born in NY.

6.  1910 Census Every-Name-Index/Images (online at Ancestry.com, Image #24 of 29):  Hugh Street, Youngsville Borough, Warren Co., PA, Roll T624_1425, p. 157B, SN 12B, SD 18, ED 184, enumerated 20 Apr 1910, official enumeration date 15 Apr 1910 (extracted by Diana Gale Matthiesen):

1910:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

2

3

4

5

6

7

8

9

10

11

12

13

14

17

18

19

20

21

22

23

24

25

26

28

*

276

291

Lyon George O

Head

M

W

52

M1

20

NY

US

US

Eng

Carpenter

House

W

N

0

Y

Y

R

H

____ Etta M

Wife

F

W

38

M1

20

7

6

PA

NY

PA

Eng

None

Y

Y

____ William ?

Son

M

W

14

S

NY

NY

PA

Eng

None

Y

Y

Y

____ Iva P

Dau

F

W

7

S

PA

PA

NY

None

Y

____ Olive A

Dau

F

W

4

S

PA

PA

NY

None

Y

____ Ivan E

Son

M

W

1 11/12

S

PA

PA

NY

*Hugh Street

7.  1920 Census Every-Name-Index/Images (online at Ancestry.com, Image #25 of 34):  Fourth Street, Youngsville, Brokenstraw Twp., Warren Co., PA, Roll T625_1657, p. 140A, SN 13A, SD 17, ED 183, enumerated 13 Jan 1920, official enumeration date 1 Jan 1920 (extracted by Diana Gale Matthiesen):

1920:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

3

4

5

6

7

9

10

11

12

16

17

18

19

21

23

25

26

27

28

*

295

337

Lyon George

Head

R

M

W

62

M

Y

Y

NY

RI

RI

Y

Carpenter

House

OA

____ Mary E

Wife

F

W

51

M

Y

Y

PA

NY

PA

Y

None

____ Iva

Dau

F

W

17

S

N

Y

Y

PA

NY

PA

Y

None

____ Olive

Dau

F

W

13

S

Y

Y

Y

PA

NY

PA

Y

None

____ Ivan

Son

M

W

12

S

Y

Y

Y

PA

NY

PA

Y

None

*Fourth Street

Both of George's parents were born in NY.

8.  1930 Census Every-Name-Index/Images (online at Ancestry.com, Image #11 of 40):  Sixth Street, Youngsville Borough, Warren Co., PA, Roll 2154, p. 162A, SN 6A, ED 62-40, SD 2, enumerated 7 Apr 1930, official enumeration date 1 Apr 1930 (extracted by Diana Gale Matthiesen):

1930:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).
1	3	4	5	6	7	8	10	11	12	13	14	16	17	18	19	20	24	25	26	27	28	30
*	131	136	Lyons Ivan E	Head	O	$1500	N	M	W	21	S	N	Y	PA	NY	PA	Y	Machinist	Furniture Shop	W	Y	N
			_____ Mary E	Mother				F	W	61	Wd	N		PA	NY	PA	Y	None
*Sixth Street

Listed four households from Mary's married son, William A. LYONS.

9.  Pedigree (online at the Sorenson Molecular Genealogy Foundation).

10.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).