Hi Jacob,
Well, I can't say I've done a lot on them but I've pieced together a few things. I think mostly through articles, obits, marriage announcements, etc. found in the NY Times Archives. What I have in my tree is this:
Madeline Ehret married William Ottman, Sr.
Their son, William Ottman, Jr. married Carol Phyllis Schmid, dau. of Charles P. Schmid & Florence M. Trautman(n)
One son to them that I know of:
Michael Ehret Ottman b. 13 Jun 1934
I have Michael's wife as Mary Ann (Unknown) and children:
Karen, Kelly, Kimberly & Mark Ottman

I am not sure what my source was for Michael's family but it seems like it may have been an obit. Due to renovations at my home, I have put a lot of my family research away including my "research" computer. I am going by my tree which is posted on Ancestry.com.

I am looking at a wedding announcement from 1902 for Miss Elizabeth C. Ehret, dau. of George Ehret; to Louis D. Conley. Sister Madeline is the maid of honor. Among the guests were Mr. & Mrs. Jacob Ruppert, Mr. & Mrs. George Ruppert, Col. Jacob Ruppert, Jr.
Another article a couple of years later describes the Annual German Charity Ball at the Waldorf-Astoria. William Holdzderber, Chairman of the committee; and Miss Madeline Ehret, opened the ball. It goes on to describe Madeline's attire, which included diamonds and emeralds. It gives a list of patrons & attendees and Jacob Ruppert was among them.

Certainly all these folks were active in the same social circles, which were rather high society. Trautmann & Blampey family were proprietors of Trautman, Bailey & Blampey lithographers. Charles P. Schmid was apparently president of that organization and so that makes sense that he would end up marrying one of Ralph Trautman's daughters. Again, these relations are all through marriage to my family. Trautman's wife, Mary, was the sister of Maria Blampey who married William Munn (my gr gr granduncle) the tinsmith. I often wonder how or whether he fit in to all this. The 2 other Blampey siblings apparently never married (George Smith Blampey and Charlotte Montague Blampey). William and Maria (Blampey) Munn had only one apparent child who survived to adulthood, Charlotte Munn; and she married well, to John H. Licht, of Patent Cereals Co., they lived in Geneva, NY.

So anyhow, it is through the marriage of Carol P. Schmid to William Ottman, Jr. which led me to the Ehret family in any way...
if I can dig up any more on Madeline's line I will let you know for sure!

Well, George was more than somewhat high class...see attached photo.

Here's an interesting article:

Streetscapes
A Park Ave. Mansion Built With Beer

By CHRISTOPHER GRAY
Published: July 17, 2005
Q In the 1920's, I often visited relatives in Manhattan in the East 90's, and I remember the big brownstone house at 93rd Street and Park Avenue, with privet hedges and an iron lance fence, owned by Ehret the brewer. When was it built? ... Robert O'Connell, Basking Ridge, N.J.

The brewer George Ehret built the house in 1879. Ehret came from Germany to the United States in 1852, already experienced in beer manufacture. In 1866, he established the Hell Gate brewery, which was soon on 92nd Street from Second to Third Avenue.

He and his family lived in a building in the brewery complex - they survived a fire there in the brewery stables in 1870. What was then Fourth Avenue was little more than a railroad cut, although the high ground at 93rd Street had been laid out as a park, Prospect Hill, a day-trip destination. From that point, a visitor could look out over deforested Manhattan and see the Harlem Plain, the Palisades, even the Connecticut shore.

The landscaping of the Fourth Avenue malls in the mid-1870's lent a boulevard air to what had been just a railroad avenue, and in 1877 Ehret bought the blockfront on the east side of the avenue from 93rd to 94th Street. The architect William Field designed a stocky brownstone mansion, which cost $50,000.

For unexplained reasons, Ehret and Field pushed the new house to the farthest lot north on the blockfront, leaving a raw southern facade overlooking a huge garden, as if they expected other mansions to spring up along the frontage. There is no indication that Ehret was anything but happy with his house, but a reviewer for The Real Estate Record & Guide published a wrathful critique in 1883.

The detail "is everywhere coarse and bad," the critic wrote; the consoles under the pediments and lintels were "peculiarly nefarious compositions"; and the cornice and balustrade were a "vulgar performance." Generally, the critic's indignation was aroused over "the superabundance of things," the overloading of the mansion with what he considered meretricious ornament.

Ehret seems to have shrugged off the complaint, as he did a labor boycott in the mid-1880's, when union members barged into saloons that sold his beer and threatened owners and even patrons who were drinking the Ehret brew. The boycott involved Ehret's testimony against union members in an extortion case. The New York Times said that Ehret was not to be provoked, that he thought that "the working people would after a while come to their senses."

Ehret and his house are closely linked to one of the most unusual photographic panoramas ever made in New York City. In 1882, the Bavarian-born photographer Peter Baab climbed to the cupola at the roof and made a striking eight-panel image, a full 360 degrees. Baab, who had a photographic studio at Third Avenue and 86th Street from the 1860's through the 1890's, was either hired by Ehret or gained the brewer's permission to make the series of sweeping views from the highest point on the east side.

They show the Central Park Reservoir and the American Museum of Natural History to the southwest; a miscellany of wooden houses and brownstones in Yorkville to the southeast; the newly reconstructed Fourth (now Park) Avenue; the Ehret brewery; the institutional complexes on Wards and Randalls Islands to the east; the Long Island Sound; the fire tower on Mount Morris at 122nd Street and Fifth Avenue to the north; and, finally, coming around to the west, the partly completed, towered mansion of Ehret's friend and Yorkville brewing competitor Jacob Ruppert, at 93rd and Fifth.

The same critic who lambasted Ehret's house waxed indignant over Ruppert's, which he said exhibited "the defective architectural education of the architect," William Schickel.

The Museum of the City of New York has an original presentation set of Baab's images, mounted on heavy board with gilt edges. They were given to the museum in 1966 by Caroline Eggers, who was related to Ehret; her father, Edwin Henes, worked for Ehret and lived in a frame house at 128 East 93rd Street, which is pictured in one of the photographs.

News reports often place Ehret in Germany - he was there in 1889 for his 25th wedding anniversary. But he was at home in 1893 for the marriage of his daughter Josephine, a ceremony also attended by Ruppert.

Ehret was in Germany in 1914 when war broke out and did not get back to the United States before it entered the war in 1917. His son George Ehret Jr. agreed to turn over the family's $40 million business to the United States - Ehret was an American citizen, but the federal government's alien property custodian, A. Mitchell Palmer, said that the 82-year-old Ehret's temporary residence in Germany was enough to trigger the action.

Ehret returned to the United States by steamship in August 1918, three months before World War I ended, accompanied by two captains he had retained to help him in case the boat was torpedoed. "Everybody in Germany except the military," he told The Times, "is crying for peace." After the war, the brewery was returned to the family.

Ehret died in his house in 1927, leaving an estate of $38 million. The family sold the house to the developer Abraham Bricken, who built an apartment house on the site, at 1185 Park Avenue, which is known for its drive-in landscaped center courtyard. Limping along under the burdens of Prohibition, the Ehrets ended their brewery operations in 1929.

E-mail: streetscapes@nytimes.com