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I am familiar with the Irish naming pattern that 1st son would be named after father’s father.
Yesterday at a Irish family history seminar, I heard that this naming occurred only if father’s father was deceased. 
Because it was bad luck (or just inconvenient) to have 3 living persons with same name in same family.  Is this true ? 
And if so, is it reasonable to consider (for Irish family in Liverpool in 1850’s) :
    If 1st son was not named after father’s father… then father’s father was still living.
    (Next likely name for this 1st son would be mother’s father name).
    AND if 2nd son was named after father’s father… then father’s father death occurred in the time
    between births of 1st and 2nd son.

As quoted below from 1903 probate records of Ellen LANE, otherwise known as Ellen LEE, in Surrogate’s Court, Kings County (Brooklyn) New York. 
I’m wondering if there is any truth to this.  Is the surname Lee connected to the surname Lane somewhere in Ireland or in Irish ?
Or am I right to think that her uncle Patrick Lane did not want to be found, so started to call himself Patrick Lee ?

“””
Q.  Now, Miss Benedict, will you please tell us, in your own language, about how this woman went under the name of Lee or Lane ?  How did that come about, if you know ?
A.  Well, she told me that when she lived in Ireland as a young girl, her name was Lane, Ellen Lane.  Her father’s name as Lane, and she said that when she came to this country she found her uncle, who had preceded her and whose name was Patrick Lane, had called himself Lee, but she did not know the reason why, except that she told me that Lee and Lane were the same in Ireland, and when she came here and found her uncle was calling himself Lee, why naturally, she called herself Lee and she was known as Lee.   I think her brother had preceded her and she found he was calling himself (James) Lee.
“””

Any comments/advice appreciated.
Stella

From the internment register of Calvary Cemetery, San Francisco :
Dougherty, Bridget ,  nativity Ireland, married, occupation wife John, residence 33 Clarence, parish St. Rose, cause of death Consumption, died 1881 Jan 11, age 30 yrs, interred in Dor. 5, Sta. 76, Area 9, Grave 7.8, Burial $8 Paid, Purchaser John Dougherty, purchased Sep 23, 1876, remarks 29673
LINK:  http://www.sfgenealogy.com/php/holycross/view.php#indexed
(after clicking on Jan 1881, go to page 918, Bridget is near bottom of page)

~1940 the graves of Calvary Cemetery were removed to Holy Cross Cemetery in nearby Colma.   Here is the record of removal for Bridget Dougherty’s grave :
http://www.rootschat.com/links/0vhe/

San Francisco civil records were destroyed in the 1906 earthquake, so if no obituary, then you may want to try records of St. Rose Church which was located close by Clarence Place.  St. Rose survived 1906, but was demolished after the 1989 earthquake.  Here’s link for the Archives of San Francisco Diocese.  I don’t know if they do lookups, but with your specific details, it’s worth a try for Bridget & John’s marriage and death records.
http://www.rootschat.com/links/0vhf/

good to know that Maghera and Magheraboy Lower really are same place.
Thanks Lavendar2013